In the reaction

Question

2HNO3(aq) + Cu(s) + 2H+(aq) �¨ 2NO2(g) + Cu2+(g) + 2H2O(l)
Which of the following statements is correct?

A.HNO3 is the reducing agent, and Cu is the oxidizing agent
B.HNO3 is the reducing agent, and H+ is the oxidizing agent
C.Cu is the reducing agent, and H+ is the oxidizing agent
D.Cu is the reducing agent, and HNO3 is the oxidizing agent
E.H+ is the reducing agent, and Cu is the oxidizing agent

Answer 1

Here is how you can answer.
Oxidation is the loss of electrons. Reduction is the gain of electrons.
The oxidizing agent is reduced; the reducing agent is oxidized.
Look at N in HNO3 and Cu to see which is which. I'll be glad to check your answers.