Which of the following statements are true?

Question

For statements a) through d) use the reaction:


Cu(s) + 2Ag+(aq) --> 2Ag(s) + Cu2+(aq)



a) Cu is the oxidizing agent

b) Ag+ is the oxidizing agent

c) Cu is oxidized

d) Ag+ is oxidized

e) HCl(g) + NH3(g) --> NH4Cl(s) is a redox reaction

f) O3(g)(aq) + NO(g) --> O2(g) + NO2(g) is a redox reaction

Answer 1

Your formula itself is incorrect...you must have copied it wrong.

Answer 2

a. Wrong. Oxidation number of Cu increases from 0 to +2 so Cu is the reducing agent.

b. Right, because oxidation number of Ag is reduced from +1 to 0.

c. Right, Cu is the reducing agent so Cu is oxidized.

d. Wrong, Ag is the oxidizing agent so Ag is reduced.

e. Wrong, the oxidation number of the elements is not changed.

f. Right, the oxidation number changes, for example the ox.num. of N increases for +2 to +4.