Answer to Question #153873 in General Chemistry for frer

Question

3 Cu (s) + 2 NO3 - (aq) + 8 H+ (aq) --> 3 Cu2+ (aq) + 2 NO (g) + 4 H2O (l)

A student added a 0.[your birth MONTH and DAY] g sample of copper to an Erlenmeyer flask. The student then titrated the solid copper in the flask with a solution of NaNO3. The balanced chemical equation for the reaction that occurred during the titration is shown above. (A)Identify the species that was reduced in the titration reaction. Justify your answer in terms of oxidation numbers.

Answer 1

Cu: The oxidation state before reaction is 0 and after reaction is +2

N: The oxidation state before reaction is +5 and after reaction is +2

So, NaNO₃ was reduced to NO