Which of the following are redox reactions? For redox reactions, determine which

Question

Which of the following are redox reactions? For redox reactions, determine which element is oxidized and which is reduced, and identify the oxidizing agent and the reducing agent

Zn (s) + 2HNO3 (aq) ? Zn(NO3)2 (aq) + H2 (g)

P4O10 (s) + 6H2O (l) ? 4H3PO4 (aq)     

3Cu (s) + 2NO3- (aq) + 8H+ (aq) ? 2NO (g) + 3Cu+2 (aq) + 4H2O (l)

HOCl (aq) + H+ (aq) +Cl- (aq) ? Cl2 (g) + H2O (l)

Identify the anode and cathode in a lead storage batter and indicate the half reactions occurring at each electrode. What key feature makes it possible to recharge this battery?

Describe the experiment used to determine the standard reduction potential of zinc.

What factors affect the cell voltage in a voltaic cell?

Using a table of standard reduction potentials, standard conditions are assumed.

Arrange the following chemical species: Zn(s), Cl-(aq), Cu(s), K(s), and H2(g) in order of their ease of oxidation, from easiest to oxidize to hardest to oxidize.

Arrange the following chemical species: H+(aq), I2(s), Na+(aq), Ag+(aq), and H2O(l) in order of their ease of reduction, from easiest to reduce to hardest to reduce.

Which of the following reactions is/are product favored?

Zn(s) + I2(s) ? Zn+2 (aq) + 2I-(aq)

2Cl-(aq) + I2(s) ? Cl2(g) + 2I-(aq)

2Na+(aq) + 2Cl-(aq) ? 2Na(s) + Cl2(g)

2K(s) + 2H2O(l) ? 2K+(aq) + H2(g) + 2OH-(aq)

Explanation / Answer

Zn (s) + 2HNO3 (aq) ? Zn(NO3)2 (aq) + H2 (g) ... This is redox reaction

Zn is being oxidized, H is being reduced.... Oxidizing Agent HNO3, Reducing Agent Zn

P4O10 (s) + 6H2O (l) ? 4H3PO4 (aq)     

NOT REDOX

3Cu (s) + 2NO3- (aq) + 8H+ (aq) ? 2NO (g) + 3Cu+2 (aq) + 4H2O (l)

Redox, Cu is being oxidized, NO3 is being reduced. Reducing Agent is Cu, Oxidizing Agent is NO3

HOCl (aq) + H+ (aq) +Cl- (aq) ? Cl2 (g) + H2O (l)

REDOX: Cl is being reduced, HOCl is being oxidiced. Reducing Agent HOCl, oxidizing agnet Cl

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