Worksheet 09 - CH 302 Spring 2007 Worksheet 9 Half-reaction...

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CH 302 Spring 2007 Worksheet 9 Half-reaction Δ E r 0 (V) Li + (aq) + e - Li(s) ±3.05 Al 3+ (aq) + 3e - Al(s) ±1.68 TiO(s) + 2H + + 2e - Ti(s) + H 2 O ±1.31 Ti 3+ (aq) + 3e - Ti(s) ±1.21 Ni 2+ (aq) + 2e - Ni(s) ±0.25 CO 2 (g) + 2H + + 2e - HCOOH(aq) ±0.11 2H + (aq) + 2e - H 2 (g) 0 SO 4 2- (aq) + 4H + + 2e - 2H 2 O(l) + SO 2 (aq) +0.17 Cu 2+ (aq) + 2e - Cu(s) +0.34 Fe 3+ (aq) + e - Fe 2+ (aq) +0.77 NO 3 (aq) + 2H + (aq) +e NO 2 (g) + H 2 O(l) +0.80 Au 3+ (aq) + 3e - Au(s) +1.52 Ag 2 O 3 (s) + 6H + + 4e - 2Ag + (aq) + 3H 2 O +1.67 F 2 (g) + 2e - 2F - (aq) +2.87 For questions 1-5, determine whether, as written, the reaction is a battery (“galvanic”) or electrolytic. Balance the reaction and then indicate which species is receiving the electrons and the sign of the cell for that electrode. Note: These problems are harder than the problems on the next page. It was just convenient to put them here. 1. TiO(s) + Au(s) Au 3+ (aq) + Ti(s) in acid 2. TiO(s) + Au(s) Au 3+ (aq) + Ti(s) in base 3. Ag + (aq) + F 2 (g) F ± (aq) + Ag 2 O 3 (s) in base 4. SO 4 (aq) + Al(s) Al 3+ (aq) + SO 2
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Worksheet 09 - CH 302 Spring 2007 Worksheet 9 Half-reaction...

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