WRITING CHEMICAL FORMULA

Size: px
Start display at page:

Download "WRITING CHEMICAL FORMULA"

Transcription

1 WRITING CHEMICAL FORMULA For ionic compounds, the chemical formula must be worked out. You will no longer have the list of ions in the exam (like at GCSE). Instead you must learn some and work out others. Working out charges on ions Ionic compounds contain metals and non-metals. Metal atoms (under staircase) lose electrons during a reaction and will ALWAYS form positive ions. Non-metal atoms (above the stair case) gain electrons during a reaction and will ALWAYS form negative ions. Group number in the periodic table can therefore be used to determine the charge on single ions: Group 1 elements (1 st column) = 1+ ions Group 2 elements (2 nd column) = 2+ ions Metals Group 6 elements (6 th column) = 1- ions Group 7 elements (7 th column) = 2- ions Non-metals Ions to LEARN Some ions exist as covalent or polyatomic ions (bonding between atoms within these ions is covalent and the charge is overall) and these just have to be learnt! Below is a list of some of the most common polyatomic ions: ammonium - NH4 + hydroxide - OH - chlorate - ClO3 - nitrate - NO3 - cyanide - CN - nitrite - NO2 - carbonate - CO3 2- manganate - MnO4 - chromate - CrO4 2- peroxide - O2 2- dichromate - Cr2O7 2- phosphate - PO4 3- hydrogen carbonate - HCO3 - sulfate - SO4 2- hydrogen phosphate - HPO4 2- sulfite - SO3 2- hydrogen sulfate - HSO4 - thiosulfate - S2O3 2-

2 Working out chemical formula Charges must cancel out when working out the overall formula. For example: 1. Sodium Chloride: Sodium = group 1 metal = Na + Chloride = group 7 non-metal = Cl - Formula: Na + + Cl - = NaCl Charges are equal and opposite so cancel out (ratio = 1 Na + : 1 Cl - ) 2. Magnesium Bromide: Magnesium = group 2 metal = Mg 2+ Bromide = group 7 non-metal = Br - Formula: Mg Br - = MgCl2 Charges DO NOT cancel out with one of each need 2 x Br to cancel out Mg 2+ (ratio = 1 Mg 2+ : 2Br - ) 3. Calcium Carbonate: Calcium = group 2 metal = Ca 2+ Carbonate = polyatomic ion (from list) = CO3 2- Formula: Ca 2+ + CO3 2- = CaCO3 Charges are equal and opposite so cancel out (ratio = 1 Ca 2+ : 1 CO3 2- ) 4. Ammonium sulphate: Ammonium = polyatomic ion (from list) = NH4 + Sulphate = polyatomic ion (from list) = SO4 2- Formula: 2NH4 + + SO4 2- = (NH4 + )2SO4 2- Charges DO NOT cancel out with one of each need 2 x NH4 + to cancel out SO4 2- (ratio = 2 NH4 + : 1 SO4 2- ) NOTE: when you need more than one polyatomic ion you need to use brackets.

3 Substance STRUCTURE, FORMULA AND EQUATIONS Monatomic Simple molecular Giant covalent Ionic Metallic Elements: Compounds: Elements: one metal Group 0 metal and non-metal Elements: H 2, O 2, N 2, F 2, Cl 2, Br 2, I 2, At 2, S 8, P 4 Compounds: Different non-metals bonded Elements: Silicon, carbon (diamond and graphite) Compounds: SiO 2 Structure Individual atoms with very weak forces between them Individual molecules with weak forces between them (atoms within molecules are joined by covalent bonds) Lattice structure in which all atoms are joined to other atoms by covalent bonds Lattice structure of positive and negatively charged ions (held together by attraction between the oppositely charged ions - an Lattice structure of metal ions with outer shell electrons free to move (delocalised) through the structure ionic bond) Particles Atoms Molecules Atoms Ions Ions & delocalised electrons Formula Just the symbol e.g. Ar Find from the periodic table e.g. H 2O, NH 3, CO 2, CH 4 example Elements: just the symbol Compound: ratio of atoms e.g. SiO 2, C, Si example e.g. MgCl 2 ratio of Mg 2+ : Cl - ions is 1:2 through the structure ions (see below) and work out the formula Just the symbol e.g. Fe Find from the periodic table There are some reactions from GCSE that you use at A-level. Some of these include: 1. Metal + oxygen Metal oxide 2. Hydrocarbon + oxygen carbon dioxide + water 3. Metal + acid salt + hydrogen 4. Base + acid salt + water 5. Alkali + acid salt + water 6. Metal carbonate + acid salt + water + carbon dioxide

4 TASKS 1: Give the formula of the following substances, showing working out: a) aluminium nitrate d) Potassium manganate b) vanadium(v) oxide e) Magnesium bromide c) copper(ii) hydroxide f) potassium dichromate TASK 2: For each of the following substances, identify the structure type of particles it contains and write the formula. Substance Formula Structure Type Particles sodium hydroxide ammonia ammonium chloride calcium bromide silicon dioxide silver nitrate magnesium oxide propane copper sulphate zinc phosphate EXTENSION: write down some properties of each type of structure.

5 TASK 3: Complete the following word equations and write balanced equations for each reaction. a) Aluminium + oxygen b) Nitric acid + potassium carbonate c) Ethane + oxygen d) Hydrochloric acid + magnesium e) Copper oxide + sulphuric acid f) Potassium hydroxide + hydrochloric acid EXTENSION: write ionic equations for the above reaction

Chemistry Post-Enrolment Worksheet

Chemistry Post-Enrolment Worksheet Name: Chemistry Post-Enrolment Worksheet The purpose of this worksheet is to get you to recap some of the fundamental concepts that you studied at GCSE and introduce some of the concepts that will be part

More information

Nomenclature of Ionic Compounds

Nomenclature of Ionic Compounds Nomenclature of Ionic Compounds Ionic compounds are composed of ions. An ion is an atom or molecule with an electrical charge. Monatomic ions are formed from single atoms that have gained or lost electrons.

More information

19.2 Chemical Formulas

19.2 Chemical Formulas In the previous section, you learned how and why atoms form chemical bonds with one another. You also know that atoms combine in certain ratios with other atoms. These ratios determine the chemical formula

More information

2. Draw the Bohr-Rutherford diagrams for the following Ions: S 2-, Al +3, Li +1, P -3

2. Draw the Bohr-Rutherford diagrams for the following Ions: S 2-, Al +3, Li +1, P -3 1. Complete the following table: ATOMIC STRUCTURE Name Symbol # protons # neutrons # electrons Net charge Sodium ion Na +1 +1 Oxygen atom Gold ion +3 C Cl -1 Cesium ion +1 12 +2 16-2 18 +1 10 0 Ba +2 Helium

More information

GCSE to AS Chemistry

GCSE to AS Chemistry GCSE to AS Chemistry Chemistry is a rewarding yet difficult subject that is highly valued by both employers and higher education establishments. The most challenging part of AS Chemistry is bridging the

More information

Periodic Table, Valency and Formula

Periodic Table, Valency and Formula Periodic Table, Valency and Formula Origins of the Periodic Table Mendelѐѐv in 1869 proposed that a relationship existed between the chemical properties of elements and their atomic masses. He noticed

More information

CHAPTER 5: MOLECULES AND COMPOUNDS

CHAPTER 5: MOLECULES AND COMPOUNDS CHAPTER 5: MOLECULES AND COMPOUNDS Problems: 1-6, 9-13, 16, 20, 31-40, 43-64, 65 (a,b,c,e), 66(a-d,f), 69(a-d,f), 70(a-e), 71-78, 81-82, 87-96 A compound will display the same properties (e.g. melting

More information

Summer Assignment Coversheet

Summer Assignment Coversheet Summer Assignment Coversheet Course: A.P. Chemistry Teachers Names: Mary Engels Assignment Title: Summer Assignment A Review Assignment Summary/Purpose: To review the Rules for Solubility, Oxidation Numbers,

More information

Topic 4 National Chemistry Summary Notes. Formulae, Equations, Balancing Equations and The Mole

Topic 4 National Chemistry Summary Notes. Formulae, Equations, Balancing Equations and The Mole Topic 4 National Chemistry Summary Notes Formulae, Equations, Balancing Equations and The Mole LI 1 The chemical formula of a covalent molecular compound tells us the number of atoms of each element present

More information

Elements and Compounds. Chemical Bonds compounds are made of atoms held together by chemical bonds bonds are forces of attraction between atoms

Elements and Compounds. Chemical Bonds compounds are made of atoms held together by chemical bonds bonds are forces of attraction between atoms Elements and Compounds elements combine together to make an almost limitless number of compounds the properties of the compound are totally different from the constituent elements Tro, Chemistry: A Molecular

More information

Inorganic Nomenclature

Inorganic Nomenclature Inorganic Nomenclature Chem 1-A Lab Lecture Spring 010 Chemical Formulas: the acronyms of chemistry Composed of element symbols, subscripts and sometimes parentheses Subscripts tell the number of atoms

More information

BASIC IDEAS IN CHEMISTRY

BASIC IDEAS IN CHEMISTRY BASIC IDEAS IN CHEMISTRY by Michael Clark Success in studying Chemistry depends upon the familiarity of students with a few basic ideas, conventions, and methods upon which later studies are built. This

More information

Chapter 5. Chapter 5. Naming Ionic Compounds. Objectives. Chapter 5. Chapter 5

Chapter 5. Chapter 5. Naming Ionic Compounds. Objectives. Chapter 5. Chapter 5 Objectives Name cations, anions, and ionic compounds. Write chemical formulas for ionic compounds such that an overall neutral charge is maintained. Explain how polyatomic ions and their salts are named

More information

Chemical Formulas. Chapter 7

Chemical Formulas. Chapter 7 Chemical Formulas Chapter 7 I. Reviewing Ions 1. Ion = atom or a group of bonded atoms with a positive or negative charge. I. Reviewing Ions 2. Cation = ion with a POSITIVE (+) charge. a) Forms when an

More information

Nomenclature. Introductory Chemistry: A Foundation FOURTH EDITION by Steven S. Zumdahl University of Illinois. Common Names - Exceptions

Nomenclature. Introductory Chemistry: A Foundation FOURTH EDITION by Steven S. Zumdahl University of Illinois. Common Names - Exceptions Introductory Chemistry: A Foundation FOURTH EDITION by Steven S. Zumdahl University of Illinois Nomenclature Chapter 5 1 2 Common Names Exceptions H 2 O = water, steam, ice NH = ammonia CH 4 = methane

More information

Chemical Names & Formulas. Water Ammonia Methane 1

Chemical Names & Formulas. Water Ammonia Methane 1 Chemical Names & Formulas Water Ammonia Methane 1 Why Systematic Names? # atomic particles 3 (p, n, e) # elements ~120 # elements in 8 earth s crust (99%) # elements in all 25 living things # compounds

More information

Unit 6- Bonding and Nomenclature

Unit 6- Bonding and Nomenclature Name: Unit 6 Bonding and Nomenclature Day Page # Description IC/HW Due Date Completed ALL Warmup IC 1 Ionic Bond Gizmo IC/HW 1 Covalent Bond Gizmo IC/HW 1 Cut Out Activity HW 2 Ionic Bonding Activity IC

More information

Naming Compounds Handout

Naming Compounds Handout Naming Compounds Handout IONIC COMPOUNDS versus MOLECULAR COMPOUNDS ionic compound: consist of cations (positive ions) and anions (negative ions) held together by electrostatic attraction usually metal

More information

Monatomic Ions. A. Monatomic Ions In order to determine the charge of monatomic ions, you can use the periodic table as a guide:

Monatomic Ions. A. Monatomic Ions In order to determine the charge of monatomic ions, you can use the periodic table as a guide: Monatomic Ions Ions are atoms that have either lost or gained electrons. While atoms are neutral, ions are charged particles. A loss of electrons results in a positive ion or cation (pronounced cat-eye-on

More information

Nomenclature and Formulas of Ionic Compounds. Section I: Writing the Name from the Formula

Nomenclature and Formulas of Ionic Compounds. Section I: Writing the Name from the Formula Purpose: Theory: Nomenclature and Formulas of Ionic Compounds 1. To become familiar with the rules of chemical nomenclature, based on the classification of compounds. 2. To write the proper name of the

More information

21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11

21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11 21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11 1. Consider the equation: 2Ca(s) + O 2 (g) 2CaO(s) Which of the following statements are correct? (1) Calcium and oxygen are reactants.

More information

Ionic and Covalent Bonds

Ionic and Covalent Bonds Chapter 6 Inorganic and Organic Compounds: Names and Formulas 6.1 Octet Rule and Ions Octet Rule An octet is 8 valence electrons is associated with the stability of the noble gases does not occur with

More information

Chemical Reactions Chapter 8 Assignment & Problem Set

Chemical Reactions Chapter 8 Assignment & Problem Set Chemical Reactions Name Warm-Ups (Show your work for credit) Date 1. Date 2. Date 3. Date 4. Date 5. Date 6. Date 7. Date 8. Chemical Reactions 2 Study Guide: Things You Must Know Vocabulary (know the

More information

12.1 How do sub-atomic particles help us to understand the structure of substances?

12.1 How do sub-atomic particles help us to understand the structure of substances? 12.1 How do sub-atomic particles help us to understand the structure of substances? Simple particle theory is developed in this unit to include atomic structure and bonding. The arrangement of electrons

More information

Programme in mole calculation

Programme in mole calculation Programme in mole calculation Step 1 Start at the very beginning Atoms are very small indeed! If we draw a line 1 metre long, 6,000,000,000 (6 billion) atoms could be lined end to end. So a scientist cannot

More information

CHEMICAL EQUATIONS and REACTION TYPES

CHEMICAL EQUATIONS and REACTION TYPES 31 CHEMICAL EQUATIONS and REACTION TYPES The purpose of this laboratory exercise is to develop skills in writing and balancing chemical equations. The relevance of this exercise is illustrated by a series

More information

H 2 O. Chapter 9 Chemical Names and Formulas

H 2 O. Chapter 9 Chemical Names and Formulas H 2 O Chapter 9 Chemical Names and Formulas Section 9.1: Naming Ions OBJECTIVES: Identify the charges on monatomic ions by using the periodic table, and name the ions. Define a polyatomic ion and write

More information

MODERN CHEMISTRY. 8. What is the formula for aluminum sulfate? 9. What is the formula for barium hydroxide?

MODERN CHEMISTRY. 8. What is the formula for aluminum sulfate? 9. What is the formula for barium hydroxide? MODERN CHEMISTRY Date Name Period Multiple Choice - Identify the choice that best completes the statement or answers the question. Use answer-key worksheet (Page 6) to key in answers to questions. 1. A

More information

Experiment 5: Studying Chemical Reactions

Experiment 5: Studying Chemical Reactions 1 Experiment 5: Studying Chemical Reactions When a chemical reaction occurs, substances called reactants are transformed into different substances called products that may have different appearances and

More information

Test 3 Formula and math of formula review. 2. The oxide of metal X has the formula XO. Which group in the Periodic Table contains metal X?

Test 3 Formula and math of formula review. 2. The oxide of metal X has the formula XO. Which group in the Periodic Table contains metal X? Name: Sunday, November 04, 2007 Test 3 Formula and math of formula review 1. Which is an example of a binary compound? 1. acetic acid 3. potassium hydroxide 2. nitric acid 4. potassium oxide 2. The oxide

More information

EXPERIMENT 3 Naming Inorganic Compounds

EXPERIMENT 3 Naming Inorganic Compounds EXPERIMENT 3 Naming Inorganic Compounds Introduction Currently, there are over 20 million known chemical compounds. The names and formulas of these compounds are an essential vocabulary in chemistry. To

More information

Chapter 7. Answers to Questions

Chapter 7. Answers to Questions Chapter 7 Answers to Questions 1. (a) S 2 (b) Ca 2+ (c) I 2. (a) Al 3+ (b) P 3 (c) Sn 2+ 3. (a) cobalt(ii) (b) potassium (c) nitride 4. (a) fluoride (b) mercury(ii) (c) cadmium 5. (a) The sodium ion is

More information

CHEMICAL NAMES AND FORMULAS. Nomenclature

CHEMICAL NAMES AND FORMULAS. Nomenclature CHEMICAL NAMES AND FORMULAS Nomenclature Naming Monatomic Ions Monatomic ions single atom with a (+) or (-) charge Cations Group 1A, 2A, and 3A elements Name is the same as the metal followed by the word

More information

Ionic bonds are the electrostatic attraction of oppositely charged ions. The cation is usually a metal, and the anion is usually a nonmetal.

Ionic bonds are the electrostatic attraction of oppositely charged ions. The cation is usually a metal, and the anion is usually a nonmetal. Chapter 4 Ionic Bond Introduction Atoms can gain or lose valence electrons to become ions. Ions can be monatomic, such as Ca 2+ and Cl, or polyatomic, such as NH 4 1+ and CO 3. An bond is the electrostatic

More information

Chemical Reactions and Equations. Chapter 8

Chemical Reactions and Equations. Chapter 8 Chemical Reactions and Equations Chapter 8 Describing Chemical Reactions A chemical reaction is the process by which one or more substances are changed into different substances Reactants Products When

More information

? I have some understanding but I need to revise this some more

? I have some understanding but I need to revise this some more 1 I am confident that I understand this and I can apply this to problems? I have some understanding but I need to revise this some more I don t know this or I need help because I don t understand it National

More information

Atomic Structure. Name Mass Charge Location Protons 1 +1 Nucleus Neutrons 1 0 Nucleus Electrons 1/1837-1 Orbit nucleus in outer shells

Atomic Structure. Name Mass Charge Location Protons 1 +1 Nucleus Neutrons 1 0 Nucleus Electrons 1/1837-1 Orbit nucleus in outer shells Atomic Structure called nucleons Name Mass Charge Location Protons 1 +1 Nucleus Neutrons 1 0 Nucleus Electrons 1/1837-1 Orbit nucleus in outer shells The number of protons equals the atomic number This

More information

Name Date Class. Atoms and Bonding Section Summary. Ionic Bonds

Name Date Class. Atoms and Bonding Section Summary. Ionic Bonds Name Date Class Atoms and Bonding Section Summary Ionic Bonds Guide for Reading What are ions, and how do they form bonds? How are the formulas and names of ionic compounds written? What are the properties

More information

No Brain Too Small. Credits: Four

No Brain Too Small. Credits: Four No Brain Too Small Level 1 Science 2015 90944 Demonstrate understanding of aspects of acids and bases Credits: Four Achievement Achievement with Merit Achievement with Excellence Demonstrate understanding

More information

AP Chemistry Pre-Course Packet

AP Chemistry Pre-Course Packet AP Chemistry PreCourse Packet AP Chemistry, Fall 2015 Get excited (and ready) for AP Chemistry! Name: Included in this packet is information about the exam and information you should KNOW (memorize or

More information

ATOMS. Multiple Choice Questions

ATOMS. Multiple Choice Questions Chapter 3 ATOMS AND MOLECULES Multiple Choice Questions 1. Which of the following correctly represents 360 g of water? (i) 2 moles of H 2 0 (ii) 20 moles of water (iii) 6.022 10 23 molecules of water (iv)

More information

Goals. 1. How are chemical reactions written?

Goals. 1. How are chemical reactions written? Goals 1. How are chemical reactions written? Given the identities of reactants and products, be able to write a balanced chemical equation or net ionic equation. 2. How are chemical reactions of ionic

More information

Chapter 9. Answers to Questions

Chapter 9. Answers to Questions Chapter 9 Answers to Questions 1. Word equation: Silicon Tetrachloride + Water Silicon Dioxide + Hydrogen Chloride Formulas: Next, the chemical formulas are needed. As these are all covalent compounds,

More information

Balancing Chemical Equations

Balancing Chemical Equations Balancing Chemical Equations Academic Success Center Science Tutoring Area Science Tutoring Area Law of Conservation of Mass Matter cannot be created nor destroyed Therefore the number of each type of

More information

What is a chemical reaction?

What is a chemical reaction? Chapter 5 Chemical Reactions and Equations What is a chemical reaction? How do we know a chemical reaction occurs? Writing chemical equations Predicting chemical reactions Representing reactions in aqueous

More information

Chenistry C2 question booklet part 1

Chenistry C2 question booklet part 1 Chenistry C2 question booklet part 94 minutes 94 marks Page of 34 Q. The diagram represents a carbon atom. (a) Use words from the box to answer the questions. electron neutron nucleus proton (i) What is

More information

SNC2D Chemistry Review

SNC2D Chemistry Review SNC2D Chemistry Review Name: Draw the Bohr-Rutherford diagram for each of the following atoms and determine the valence charge of their ions: Sodium: Aluminum: Sulfur: Fluorine: From your periodic table/chemistry

More information

Metals tend to form positively charged ions (cations) and nonmetals tend to form negatively charged atoms (anions).

Metals tend to form positively charged ions (cations) and nonmetals tend to form negatively charged atoms (anions). Ions are atoms with a charge Cations= positive ions Anions = negative ions Metals tend to form positively charged ions (cations) and nonmetals tend to form negatively charged atoms (anions). When a metal

More information

Part I: Parts and Meaning of a Chemical Equation:

Part I: Parts and Meaning of a Chemical Equation: Chemical Equations Name: Period: Date: Part I: Parts and Meaning of a Chemical Equation: 1) = process by which one or more substances are changed into one or more different substances (atoms are rearranged)

More information

Electronegativity The ability of an atom, when in a compound, to attract e - density to itself. Linus Pauling 1930s The Nature of the Chemical Bond

Electronegativity The ability of an atom, when in a compound, to attract e - density to itself. Linus Pauling 1930s The Nature of the Chemical Bond Study Guide for Exam #2 MSU LBS 171 Profs. Robert LaDuca and Ryan Sweeder Molecule: chem. combo. of 2 or more atoms bonded together Element: matter that is made up of only one type of atom Compound: matter

More information

Chapter 3 Ionic compounds

Chapter 3 Ionic compounds Chapter 3 Ionic compounds 3.1 Ions Atoms have the ability to gain or loose electrons and become ions. Ion: an electrically charged atom or group of atoms. Cation: an atom that has lost one or more electrons

More information

CHEM J-2 June /01(a) What is the molarity of the solution formed when 0.50 g of aluminium fluoride is dissolved in ml of water?

CHEM J-2 June /01(a) What is the molarity of the solution formed when 0.50 g of aluminium fluoride is dissolved in ml of water? CHEM1001 2014-J-2 June 2014 22/01(a) What is the molarity of the solution formed when 0.50 g of aluminium fluoride is dissolved in 800.0 ml of water? 2 The molar mass of AlF 3 is: molar mass = (26.98 (Al)

More information

Topic 3 National Chemistry Summary Notes. Bonding, Structure and Properties of Substances. Covalent Bonds

Topic 3 National Chemistry Summary Notes. Bonding, Structure and Properties of Substances. Covalent Bonds Topic 3 National Chemistry Summary Notes Bonding, Structure and Properties of Substances LI 1 Covalent Bonds Most atoms do not exist as single atoms. They are mainly found combined with other atoms in

More information

Chapter 5 - Molecules and Compounds

Chapter 5 - Molecules and Compounds Chapter 5 - Molecules and Compounds How do we represent molecules? In pictures In formula In name Ionic compounds Molecular compounds On the course website, you will find a list of ions that I would like

More information

Writing and Naming Inorganic Compounds. Ionic Compounds Definitions and examples. Covalent Compounds Definitions and examples.

Writing and Naming Inorganic Compounds. Ionic Compounds Definitions and examples. Covalent Compounds Definitions and examples. Chem 100 - Week 6 Notes Page 1 of 7 Writing and Naming Inorganic Compounds Naming IUPAC is an agency that makes rules for naming chemicals Many compounds also have common names Inorganic compounds Compounds

More information

Q1. The chart shows the processes involved in the manufacture of nitric acid from ammonia.

Q1. The chart shows the processes involved in the manufacture of nitric acid from ammonia. Chemistry C2 Foundation and Higher Questions Q1. The chart shows the processes involved in the manufacture of nitric acid from ammonia. (a) Complete the word equation for the reaction that takes place

More information

Using the Periodic table: Main Group. Using the Periodic Table:Transition Group. Binary Compounds: Names, Formulae

Using the Periodic table: Main Group. Using the Periodic Table:Transition Group. Binary Compounds: Names, Formulae Using the Periodic table: Main Group Main Group Elements 1 Using the Periodic Table:Transition Group Transition Metals Form various cations by loss of electrons e.g. Fe 2+ / Fe 3+, Cu + / Cu 2+ Cr 2+ /

More information

Exampro GCSE Chemistry

Exampro GCSE Chemistry Exampro GCSE Chemistry C Chapter higher Name: Class: Author: Date: Time: 56 Marks: 56 Comments: Page of 8 Q. The hip joint sometimes has to be replaced. Early replacement hip joints were made from stainless

More information

6 Reactions in Aqueous Solutions

6 Reactions in Aqueous Solutions 6 Reactions in Aqueous Solutions Water is by far the most common medium in which chemical reactions occur naturally. It is not hard to see this: 70% of our body mass is water and about 70% of the surface

More information

EXPERIMENT 5: CHEMICAL REACTIONS AND EQUATIONS

EXPERIMENT 5: CHEMICAL REACTIONS AND EQUATIONS PURPOSE EXPERIMENT 5: CHEMICAL REACTIONS AND EQUATIONS To perform and observe simple chemical reactions. To identify the products of chemical reactions and write balanced equations for those reactions.

More information

Ch. 9 Chemical Reactions

Ch. 9 Chemical Reactions Ch. 9 Chemical Reactions I. Intro to Reactions (p. 282 285) I II III IV V Chemical Reaction Chemical change Atoms of one or more substances (reactants) are rearranged into new substances (products) Signs

More information

Balancing Chemical Equations Worksheet

Balancing Chemical Equations Worksheet Balancing Chemical Equations Worksheet Student Instructions 1. Identify the reactants and products and write a word equation. 2. Write the correct chemical formula for each of the reactants and the products.

More information

National 4/5 Chemistry. Unit 1c - Chemical Changes and Structure

National 4/5 Chemistry. Unit 1c - Chemical Changes and Structure National 4/5 Chemistry Unit 1c - Chemical Changes and Structure Kirkcaldy High School 2013/2014 Contents Formation of ions (N4*)...1 Formation of ions (N4*)...3 Ionic bonding (N4*)...4 Writing formulae

More information

Polyatomic ions can form ionic compounds just as monatomic ions.

Polyatomic ions can form ionic compounds just as monatomic ions. 1 POLYATOMIC IONS We have seen that atoms can lose or gain electrons to become ions. Groups of atoms can also become ions. These groups of atoms are called polyatomic ions. Examples: O hydroxide ion NO

More information

Name Class Date. Step 3: Write the equation using formulas for the elements and compounds in the word equation. Al CuCl 2 : AlCl 3 Cu

Name Class Date. Step 3: Write the equation using formulas for the elements and compounds in the word equation. Al CuCl 2 : AlCl 3 Cu Skills Worksheet Math Skills Balancing Chemical Equations After you study each sample problem and solution, work out the practice problems on a separate sheet of paper. Write your answers in the spaces

More information

MOLE CONVERSION PROBLEMS. 2. How many moles are present in 34 grams of Cu(OH) 2? [0.35 moles]

MOLE CONVERSION PROBLEMS. 2. How many moles are present in 34 grams of Cu(OH) 2? [0.35 moles] MOLE CONVERSION PROBLEMS 1. What is the molar mass of MgO? [40.31 g/mol] 2. How many moles are present in 34 grams of Cu(OH) 2? [0.35 moles] 3. How many moles are present in 2.5 x 10 23 molecules of CH

More information

How many atoms are in an ammonia molecule?... (1) The diagrams show the electron arrangement in nitrogen and hydrogen.

How many atoms are in an ammonia molecule?... (1) The diagrams show the electron arrangement in nitrogen and hydrogen. Q1. (a) The diagram represents an atom of nitrogen. Label the diagram. (3) (b) Ammonia has the formula NH 3. It is made from nitrogen and hydrogen. How many atoms are in an ammonia molecule?... (c) The

More information

The Chemistry Name Game

The Chemistry Name Game The Chemistry Name Game Contributed by Butane: The Carroll College Chemistry Club Main Science Idea for Kids As students play the Chemistry Name Game, they will learn why compounds form as they do. They

More information

B. Elements: We cannot determine how many electrons are lost for the elements b/c their in their valence electrons can change.

B. Elements: We cannot determine how many electrons are lost for the elements b/c their in their valence electrons can change. Unit 6 Notepack: Chapters 9 &10 Chemical Quantities 9.1 Naming Ions NAME Period: A. ions: Ions made of single. B. Elements: There is a pattern in predicting how many electrons are lost and gained for the

More information

Q1. Hydrogen chloride (HCl) can be made by the reaction of hydrogen (H 2) with chlorine (Cl 2).

Q1. Hydrogen chloride (HCl) can be made by the reaction of hydrogen (H 2) with chlorine (Cl 2). Q. Hydrogen chloride (HCl) can be made by the reaction of hydrogen (H 2) with chlorine (Cl 2). (a) The diagrams represent molecules of hydrogen and chlorine. Draw a similar diagram to represent a molecule

More information

Oxidation-Reduction Reactions

Oxidation-Reduction Reactions Chapter 18 Oxidation-Reduction Reactions Note to teacher: You will notice that there are two different formats for the Sample Problems in the student textbook. Where appropriate, the Sample Problem contains

More information

Name: Block: Date: Test Review: Chapter 8 Ionic Bonding

Name: Block: Date: Test Review: Chapter 8 Ionic Bonding Name: Block: Date: Test Review: Chapter 8 Ionic Bonding Part 1: Fill-in-the-blank. Choose the word from the word bank below. Each word may be used only 1 time. electron dot structure metallic electronegativity

More information

Introduction to Molecules and Ions

Introduction to Molecules and Ions Introduction to Molecules and Ions Reading: Ch 3 sections 1-6 Homework: Chapter 3: 23, 25, 27, 29*, 31, 33*, 35*, 39, 43, 49*, 51*, 53 * = important homework question Molecules, Molecular Elements and

More information

Sample Exercise 2.1 Illustrating the Size of an Atom

Sample Exercise 2.1 Illustrating the Size of an Atom Sample Exercise 2.1 Illustrating the Size of an Atom The diameter of a US penny is 19 mm. The diameter of a silver atom, by comparison, is only 2.88 Å. How many silver atoms could be arranged side by side

More information

Balancing Chemical Equations

Balancing Chemical Equations Balancing Chemical Equations Aluminum reacts with copper(ii) chloride, CuCl 2, to form copper metal and aluminum chloride, AlCl 3 1. Identify the reactants and products. Aluminum and copper(ii) chloride

More information

Chemical bonding is the true difference between compounds and mixtures. Atomic elements:

Chemical bonding is the true difference between compounds and mixtures. Atomic elements: Chapter 3 - Molecules, compounds, and chemical equations Elements and compounds Chemical bonding is the true difference between compounds and mixtures Atomic elements: Ionic bond: attraction of oppositely

More information

CHEMICAL NOMENCLATURE

CHEMICAL NOMENCLATURE CHEMICAL NOMENCLATURE Chemical nomenclature The process of giving unambiguous chemical formulas or chemical names to elements and compounds Introduction Chemistry is the study of matter (elements and compounds)

More information

W1 WORKSHOP ON STOICHIOMETRY

W1 WORKSHOP ON STOICHIOMETRY INTRODUCTION W1 WORKSHOP ON STOICHIOMETRY These notes and exercises are designed to introduce you to the basic concepts required to understand a chemical formula or equation. Relative atomic masses of

More information

Nomenclature and the Periodic Table To name compounds and to determine molecular formulae from names a knowledge of the periodic table is helpful.

Nomenclature and the Periodic Table To name compounds and to determine molecular formulae from names a knowledge of the periodic table is helpful. Nomenclature and the Periodic Table To name compounds and to determine molecular formulae from names a knowledge of the periodic table is helpful. Atomic Number = number of protons Mass Number = number

More information

Nomenclature: How to Name Chemicals

Nomenclature: How to Name Chemicals Nomenclature: How to Name Chemicals Introduction Many of the chemicals we use at home have common names. Baking soda is used as a rising agent in cookies. Bleach is used to whiten our clothes. Ammonia

More information

I. Writing Formulas for Ionic Compounds The ions charges must (be multiplied to) make neutral compounds.

I. Writing Formulas for Ionic Compounds The ions charges must (be multiplied to) make neutral compounds. I. Writing Formulas for Ionic Compounds The ions charges must (be multiplied to) make neutral compounds. We must have the same number of positive charges as negative charges, so that the total charge equals

More information

Oxidation-Reduction Reactions

Oxidation-Reduction Reactions Oxidation-Reduction Reactions What is an Oxidation-Reduction, or Redox, reaction? Oxidation-reduction reactions, or redox reactions, are technically defined as any chemical reaction in which the oxidation

More information

WRITE IN THE CORRECT FORMULA THEN BALANCE THE CHEMICAL EQUATIONS

WRITE IN THE CORRECT FORMULA THEN BALANCE THE CHEMICAL EQUATIONS WRITE IN THE CORRECT FORMULA THEN BALANCE THE CHEMICAL EQUATIONS 1. Hydrogen Oxygen Water METALLIC OXIDE WATER BASE 2. Sodium oxide Water Sodium hydroxide 3. Calcium oxide Water Calcium hydroxide 4. Potassium

More information

CHM1 Review for Exam 9

CHM1 Review for Exam 9 Topics 1. Reaction Types a. Combustion b. Synthesis c. Decomposition d. Single replacement i. Metal activity series ii. Nonmetal activity series e. Double replacement i. Precipitates and solubility rules

More information

Study Guide For Chapter 7

Study Guide For Chapter 7 Name: Class: Date: ID: A Study Guide For Chapter 7 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The number of atoms in a mole of any pure substance

More information

Quantitative aspects of chemical change: Moles and molar mass

Quantitative aspects of chemical change: Moles and molar mass OpenStax-CNX module: m38717 1 Quantitative aspects of chemical change: Moles and molar mass Free High School Science Texts Project This work is produced by OpenStax-CNX and licensed under the Creative

More information

Chapter 5. Nomenclature of Inorganic Compounds

Chapter 5. Nomenclature of Inorganic Compounds Chapter 5 Nomenclature of Inorganic Compounds What type of compound is it? Ionic Compound Covalent (Nonionic) Compound Acid Cation with fixed charge Cation with variable charge Binary Acid Oxy Acid Binary

More information

CHEMISTRY. Ionic Bonding

CHEMISTRY. Ionic Bonding CHEMISTRY Ionic Bonding 1 Ionic Bonding Ionic Bonds: Give and take! Ions and Ionic Bonds Atoms with five, six, or seven valence electrons usually become more stable when this number increases to eight.

More information

CHEMICAL NAMES AND FORMULAS

CHEMICAL NAMES AND FORMULAS 9 CHEMICAL NAMES AND FORMULAS SECTION 9.1 NAMING IONS (pages 253 258) This section explains the use of the periodic table to determine the charge of an ion. It also defines polyatomic ion and gives the

More information

Chemical reactions. Classifications Reactions in solution Ionic equations

Chemical reactions. Classifications Reactions in solution Ionic equations Chemical reactions Classifications Reactions in solution Ionic equations Learning objectives Distinguish between chemical and physical change Write and balance chemical equations Describe concepts of oxidation

More information

AP Chemistry Prep - Summer Assignment 2013

AP Chemistry Prep - Summer Assignment 2013 AP Chemistry Prep - Summer Assignment 2013 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which value has only 4 significant digits? a. 6.930 c. 8450

More information

MOLES AND MOLE CALCULATIONS

MOLES AND MOLE CALCULATIONS 35 MOLES ND MOLE CLCULTIONS INTRODUCTION The purpose of this section is to present some methods for calculating both how much of each reactant is used in a chemical reaction, and how much of each product

More information

Formulae, Equations & Formula Mass

Formulae, Equations & Formula Mass St Peter the Apostle High School Chemistry Department Formulae, Equations & Formula Mass N4 & N5 Homework Questions Answer questions as directed by your teacher. National 4 level questions are first followed

More information

Chapter 11. Electrochemistry Oxidation and Reduction Reactions. Oxidation-Reduction Reactions. Oxidation-Reduction Reactions

Chapter 11. Electrochemistry Oxidation and Reduction Reactions. Oxidation-Reduction Reactions. Oxidation-Reduction Reactions Oxidation-Reduction Reactions Chapter 11 Electrochemistry Oxidation and Reduction Reactions An oxidation and reduction reaction occurs in both aqueous solutions and in reactions where substances are burned

More information

HOMEWORK 4A. Definitions. Oxidation-Reduction Reactions. Questions

HOMEWORK 4A. Definitions. Oxidation-Reduction Reactions. Questions HOMEWORK 4A Oxidation-Reduction Reactions 1. Indicate whether a reaction will occur or not in each of following. Wtiring a balcnced equation is not necessary. (a) Magnesium metal is added to hydrochloric

More information

Naming Compounds Handout Key

Naming Compounds Handout Key Naming Compounds Handout Key p. 2 Name each of the following monatomic cations: Li + = lithium ion Ag + = silver ion Cd +2 = cadmium ion Cu +2 = copper (II) ion Al +3 = aluminum ion Mg +2 = magnesium ion

More information

Formulas and Nomenclature

Formulas and Nomenclature Formulas and Nomenclature Formulas First of all, the formulas are the symbols for compounds and molecules. There are three different types of formulas, which are, Empirical formula Molecular formula Structural

More information

Question Bank Electrolysis

Question Bank Electrolysis Question Bank Electrolysis 1. (a) What do you understand by the terms (i) electrolytes (ii) non-electrolytes? (b) Arrange electrolytes and non-electrolytes from the following substances (i) sugar solution

More information

100% ionic compounds do not exist but predominantly ionic compounds are formed when metals combine with non-metals.

100% ionic compounds do not exist but predominantly ionic compounds are formed when metals combine with non-metals. 2.21 Ionic Bonding 100% ionic compounds do not exist but predominantly ionic compounds are formed when metals combine with non-metals. Forming ions Metal atoms lose electrons to form +ve ions. Non-metal

More information

IB Chemistry 1 Mole. One atom of C-12 has a mass of 12 amu. One mole of C-12 has a mass of 12 g. Grams we can use more easily.

IB Chemistry 1 Mole. One atom of C-12 has a mass of 12 amu. One mole of C-12 has a mass of 12 g. Grams we can use more easily. The Mole Atomic mass units and atoms are not convenient units to work with. The concept of the mole was invented. This was the number of atoms of carbon-12 that were needed to make 12 g of carbon. 1 mole

More information