MidtermIIAu03Solutions

MidtermIIAu03Solutions - 1 1. Classify the following...

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1 1. Classify the following reaction? Mg(CN) 2 (s) + H 2 SO 4 (aq) MgSO 4 (aq) + 2 HCN(g) a) Single-Replacement Reaction b) Double-Replacement Reaction c) Redox Reaction d) Combination Reaction e) Neutralization Reaction 2. Which of the following reactions is a neutralization reaction? a) WO 3 + 3H 2 W + 3H 2 O b) ZnCl 2 + H 2 SO 4 ZnSO 4 + 2 HCl c) Na 2 SO 3 + 2 HNO 3 2 NaNO 3 + H 2 O + SO 2 d) CaCO 3 + 2 HCl CaCl 2 + H 2 O + CO 2 e) 2 CsOH + H 2 SO 4 Cs 2 SO 4 + 2 H 2 O 3. Lead chromate is insoluble in water. Using this fact, what is the net ionic equation for the expected reaction when solutions of lead nitrate and potassium chromate are mixed. a) Pb 2+ + 2 NO 3 - + 2 K + + CrO 4 2- PbCrO 4 + 2 K + + 2 NO 3 - b) Pb 2+ + 2 NO 3 - + 2 K + + CrO 4 2- PbCrO 4 c) Pb 2+ + CrO 4 2- PbCrO 4 d) Pb(NO 3 ) 2 (aq) + K 2 CrO 4 (aq) PbCrO 4 (s) + K 2 CrO 4 (aq) e) Pb(NO 3 ) 2 (aq) + K 2 CrO 4 (aq) N.R. 4. For the reaction in Question 3, which of the following is called a spectator ion? a) K + b) PbCrO 4 c) Pb 2+ d) CrO 4 2- e) none 5. Balance the following equation. What is the sum of the coefficients of the reactants and products? _ 2 AgNO 3 + _ 1 _ Fe _ 1 _ Fe(NO 3 ) 2 + _ 2 _ Ag a) 3 b) 4 c) 5 d) 6 e) 7
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2 6. What is the oxidation number of sulfur in sulfuric acid? 2(+1) + S + 4(-2) = 0 S = +6 a) -6 b) -4 c) -2 d) +4 e) +6 7. Which of the halogens is the strongest oxidizing agent? a) F 2 b) Cl 2 c) Br 2 d) I 2 8. Identify the reducing agent in the following reaction. 2 NaCl (aq) + F 2 (g) 2 NaF (aq) + Cl 2 (g) a) Na + b) Cl - reduces F 2 to F - c) Cl 2 d) NaF e) F 2 9. Which of the following reactions is an oxidation? a)
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This note was uploaded on 06/03/2011 for the course CHM 123 taught by Professor Woodward during the Fall '08 term at Ohio State.

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MidtermIIAu03Solutions - 1 1. Classify the following...

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