Chapter 9 Practice Test - Naming and Writing Chemical Formulas
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1 Chapter 9 Practice Test - Naming and Writing Chemical Formulas Matching Match each itme with the correct statement below. Match each item with the correct statement below. a. monatomic ion f. cation b. acid g. binary compound c. base h. anion d. law of definite proportions i. polyatomic ion e. law of multiple proportions 1. consists of a single atom with a positive or negative charge 2. atom or group of atoms having a negative charge 3. atom or group of atoms having a positive charge 4. tightly-bound group of atoms that behaves as a unit and carries a net charge 5. compound composed of two different elements 6. produces a hydrogen ion when dissolved in water 7. produces a hydroxide ion when dissolved in water 8. In any chemical compound, the masses of elements are always in the same proportion by mass. 9. when two elements form more than one compound, the masses of one element that combine with the same mass of the other element are in the ratio of small, whole numbers Multiple Choice Identify the choice that best completes the statement or answers the question. 10. When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a. a. prefix c. Roman numeral following the name b. suffix d. superscript after the name 11. Which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion? a. fluorine, F, fluoride ion c. copper, Cu, cuprous ion b. zinc, Zn, zincate ion d. sulfur, S, sulfurous ion 12. The nonmetals in Groups 6A and 7A. a. lose electrons when they form ions b. have a numerical charge that is found by subtracting 8 from the group number c. all have ions with a 1 charge d. end in -ate 13. Which of the following is NOT a cation? a. iron(iii) ion c. Ca b. sulfate d. mercurous ion
2 14. An -ate or -ite at the end of a compound name usually indicates that the compound contains. a. fewer electrons than protons c. only two elements b. neutral molecules d. a polyatomic anion 15. Which of the following is true about the composition of ionic compounds? a. They are composed of anions and cations. b. They are composed of anions only. c. They are composed of cations only. d. They are formed from two or more nonmetallic elements. 16. Which element, when combined with fluorine, would most likely form an ionic compound? a. lithium c. phosphorus b. carbon d. chlorine 17. Which of the following compounds contains the lead(ii) ion? a. PbO c. Pb 2 O b. PbCl 4 d. Pb 2 S 18. What is the correct formula for potassium sulfite? a. KHSO c. K SO b. KHSO d. K SO 19. What type of compound is CuSO? a. monotomic ionic c. polyatomic ionic b. polyatomic covalent d. binary molecular 20. Sulfur hexafluoride is an example of a. a. monatomic ion c. binary compound b. polyatomic ion d. polyatomic compound 21. Molecular compounds are usually. a. composed of two or more transition elements b. composed of positive and negative ions c. composed of two or more nonmetallic elements d. exceptions to the law of definite proportions 22. In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by. a. Roman numerals c. prefixes b. superscripts d. suffixes 23. Consider a mystery compound having the formula M T. If the compound is not an acid, if it contains only two elements, and if M is not a metal, which of the following is true about the compound? a. It contains a polyatomic ion. c. Its name ends in -ic. b. Its name ends in -ite or -ate. d. It is a binary molecular compound. 24. When dissolved in water, acids produce. a. negative ions c. hydrogen ions b. polyatomic ions d. oxide ions 25. When naming acids, the prefix hydro- is used when the name of the acid anion ends in. a. -ide c. -ate
3 b. -ite d. -ic 26. What is the name of H SO? a. hyposulfuric acid c. sulfuric acid b. hydrosulfuric acid d. sulfurous acid 27. When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix. a. -ous c. -ate b. -ic d. -ite 28. What is the formula for hydrosulfuric acid? a. H S c. HSO b. H SO d. H S 29. What is the correct name for the compound CoCl? a. cobalt(i) chlorate c. cobalt(ii) chlorate b. cobalt(i) chloride d. cobalt(ii) chloride 30. What is the correct formula for barium chlorate? a. Ba(ClO) c. Ba(ClO ) b. Ba(ClO ) d. BaCl 31. What is the correct formula for calcium dihydrogen phosphate? a. CaH PO c. Ca(H PO ) b. Ca H PO d. Ca(H HPO ) 32. What does an -ite or -ate ending in a polyatomic ion mean? a. Oxygen is in the formula. c. Nitrogen is in the formula. b. Sulfur is in the formula. d. Bromine is in the formula. 33. What is the correct name for Sn (PO )? a. tritin diphosphate c. tin(iii) phosphate b. tin(ii) phosphate d. tin(iv) phosphate Essay 34. Name the compounds CuBr, SCl, and BaF. Explain the use or omission of the Roman numeral (II) and the prefix di-.
4 Chapter 9 Practice Test - Naming and Writing Chemical Formulas Answer Section MATCHING 1. ANS: A PTS: 1 DIF: L1 REF: p ANS: H PTS: 1 DIF: L1 REF: p ANS: F PTS: 1 DIF: L1 REF: p ANS: I PTS: 1 DIF: L1 REF: p. 257 OBJ: Define a polyatomic ion and write the names and formulas of the most common polyatomic ions. 5. ANS: G PTS: 1 DIF: L1 REF: p ANS: B PTS: 1 DIF: L1 REF: p ANS: C PTS: 1 DIF: L1 REF: p. 273 OBJ: Apply the rules for naming bases. 8. ANS: D PTS: 1 DIF: L1 REF: p. 274 OBJ: Define the laws of definition proportions and multiple proportions. 9. ANS: E PTS: 1 DIF: L1 REF: p. 274 OBJ: Define the laws of definition proportions and multiple proportions. MULTIPLE CHOICE 10. ANS: C PTS: 1 DIF: L1 REF: p. 254 p ANS: C PTS: 1 DIF: L2 REF: p. 254 p ANS: B PTS: 1 DIF: L2 REF: p. 254 STA: Ch.1.c Ch.1.d 13. ANS: B PTS: 1 DIF: L1 REF: p. 254 p. 255 p Define a polyatomic ion and write the names and formulas of the most common polyatomic ions. 14. ANS: D PTS: 1 DIF: L2 REF: p. 257 OBJ: Define a polyatomic ion and write the names and formulas of the most common polyatomic ions. 15. ANS: A PTS: 1 DIF: L2 REF: p. 261.a 16. ANS: A PTS: 1 DIF: L2 REF: p. 253 p. 254 p. 262
5 17. ANS: A PTS: 1 DIF: L2 REF: p. 262 p ANS: C PTS: 1 DIF: L2 REF: p. 257 p. 261 p. 262 OBJ: Apply the rules for naming and writing formulas for compounds with polyatomic ions. 19. ANS: C PTS: 1 DIF: L2 REF: p. 264 p. 277 OBJ: Apply the rules for naming and writing formulas for compounds with polyatomic ions..a 20. ANS: C PTS: 1 DIF: L2 REF: p. 268 OBJ: Interpret the prefixes in the names of molecular compounds in terms of their chemical formulas..a 21. ANS: C PTS: 1 DIF: L1 REF: p. 268 OBJ: Interpret the prefixes in the names of molecular compounds in terms of their chemical formulas Apply the rules for naming and writing formulas for binary molecular compounds..a 22. ANS: C PTS: 1 DIF: L1 REF: p. 269 OBJ: Apply the rules for naming and writing formulas for binary molecular compounds. 23. ANS: D PTS: 1 DIF: L3 REF: p. 268 p. 269 OBJ: Apply the rules for naming and writing formulas for binary molecular compounds. 24. ANS: C PTS: 1 DIF: L1 REF: p ANS: A PTS: 1 DIF: L2 REF: p ANS: D PTS: 1 DIF: L2 REF: p ANS: A PTS: 1 DIF: L2 REF: p ANS: D PTS: 1 DIF: L3 REF: p. 272 OBJ: Apply the rules in reverse to write formulas of acids. 29. ANS: D PTS: 1 DIF: L2 REF: p. 261 p. 262 p Apply the rules for naming chemical compounds by using a flowchart. 30. ANS: C PTS: 1 DIF: L3 REF: p. 257 p. 264 OBJ: Apply the rules for naming and writing formulas for compounds with polyatomic ions Apply the rules for naming chemical compounds by using a flowchart. 31. ANS: C PTS: 1 DIF: L3 REF: p. 257 p. 264 OBJ: Apply the rules for naming and writing formulas for compounds with polyatomic ions Apply the rules for naming chemical compounds by using a flowchart. 32. ANS: A PTS: 1 DIF: L1 REF: p. 257 p. 278 OBJ: Identify the two common endings for the names of most polyatomic ions Apply the rules for writing chemical formulas by using a flowchart. 33. ANS: B PTS: 1 DIF: L3 REF: p. 264 p. 277 OBJ: Apply the rules for writing chemical formulas by using a flowchart..b Ch.5 ESSAY 34. ANS:
6 CuBr is copper(ii) bromide. The name must include a Roman numeral because copper is a transition element that can form ions with more than one charge. SCl 2 is sulfur dichloride. The compound is named with prefixes because sulfur and chlorine are both nonmetals and thus form a molecular compound. BaF is barium fluoride. A Roman numeral is not needed in this name because barium is a Group A metal and forms only the 2+ ion. Prefixes are not used in ionic compounds. PTS: 1 DIF: L3 REF: p. 277 OBJ: Apply the rules for writing chemical formulas by using a flowchart.
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