Types of Chemical Reactions Pre-Lab Assignment

Transcription

1 Types of Chemical Reactions Pre-Lab Assignment Name Period Date The pre-lab is due at the beginning of the laboratory period 1. Read the entire procedure before beginning this pre-lab assignment. What questions do you have regarding the procedure? 2. What is the purpose of this lab? (In your own words) 3. Please classify each of the following reactions as one of the 5 major types. a. AgNO 3 (aq) + Cu (s) Cu(NO 3 ) 2 (aq) + Ag (s) b. BaCl 2 (aq) + Na 2 SO 4 (aq) BaSO 4(s) + NaCl (aq) c. Cl 2(g) + NaBr (aq) NaCl (aq) + Br 2 (l) d. C 2 H 6 O (l) + O 2(g) H 2 O (l) + CO 2(g) e. KClO 3(s) KCl (s) + O 2(g) f. AlCl 3 (aq) + NH 4 OH NH 4 Cl (aq) + Al(OH) 3 (s) g. H 2(g) + O 2(g) H 2 O (l) 4. How could a decomposition reaction be identified when only the reactant(s) is/are 5. How could a single-replacement reaction be identified when only the reactant(s) is/are a. What happens during a single-replacement reaction?

2 6. How could a double replacement reaction be identified when only the reactant(s) is/are a. What happens during a double replacement reaction? 7. What are 5 indicators of a chemical change? a. b. c. d. e. 8. What does soluble mean? (in your own words) a. What symbol is used for a compound that is soluble? 9. What is the term for an insoluble product that forms when 2 soluble reactants undergo a chemical change? a. What symbol is used for a substance that is insoluble? 10. Please identify the state of matter of each of the following a. N 2 b. C c. H 2 SO 4 d. Pb e. Pb(NO 3 ) How are the properties of oxygen different from the properties of carbon dioxide?

3 Types of Chemical Reactions Lab: Procedure Part A: Obtain a small amount of CaO and distilled water. o Initial observations of CaO solid opaque white powder o Initial observations of distilled water clear, colorless liquid o Mix a small amount of CaO with distilled water. Test with litmus paper. Note: acid means excess H + and a base means excess hydroxide. Observations: red litmus paper turns blue _test tube feels cold to touch Indicator(s) of a chemical change What type of reaction is this? CaO + H 2 O Part B: Obtain a small amount of CaCO 3, a small test tube, and a Bunsen burner. o Initial observations of CaCO 3? solid opaque white fine powder o Place a small amount of CaCO 3 in a small test tube, and heat it over a Bunsen burner. Test for any gas that may be given off by placing a burning wood splint inside the mouth of the test tube. : volume of solid is reduced burning splint goes out when placed in the mouth of the test tube CaCO 3 Δ

4 Part C: Obtain a piece of copper metal and AgNO 3. o Initial observations of copper metal o Initial observation of AgNO 3 o Place the piece of copper metal into a solution of silver nitrate Cu + AgNO 3 Part F: Obtain FeCl 3 and K 4 (Fe(CN) 6 o Initial observations of FeCl 3 o Initial observations of K 4 (Fe(CN) 6 o Mix several drops of FeCl 3 with an equal amount of K 4 (Fe(CN) 6 FeCl 3 + K 4 (Fe(CN) 6 Part H: Obtain Ni(NO 3 ) 2 and K 2 C 2 O 4 o Initial observations of Ni(NO 3 ) 2 o Initial observations of K 2 C 2 O 4 o Mix several drops of Ni(NO 3 ) 2 with several drops of K 2 C 2 O 4.

5 Please complete (and balance) the equation, labeling all the states of reactants and products Ni(NO 3 ) 2 + K 2 C 2 O 4 Part I: Obtain Co(NO 3 ) 2 and Na 3 PO 4 o Initial observations of Co(NO 3 ) 2 o Initial observations of Na 3 PO 4 o Mix several drops of Co(NO 3 ) 2 with an equal amount of Na 3 PO 4 Co(NO 3 ) 2 + Na 3 PO 4 Part J: Obtain Pb(NO 3 ) 2 and KI o Initial observations of Pb(NO 3 ) 2 o Initial observations of KI o Mix several drops of Pb(NO 3 ) 2 with an equal amount of KI Pb(NO 3 ) 2 + KI