Question

1. Copper metal reacts with dilute nitric acid according to the following equation:
3 Cu(s) + 8 HNO3(aq)  3 Cu(NO3)2(aq) + 2 NO(g) + 4 H2O(l)
A copper penny that weighs 3.02 g was reacted with a solution containing 7.88 g of nitric acid.
a) Calculate the theoretical yield of nitrogen monoxide gas produced.
b) Calculate the un-reacted mass of the excess reagent.
c) If the reaction produced 0.782 g of nitrogen monoxide gas, calculate the percentage yield in the reaction.

Answer 1

a) 0.9375 gm

b) 0.0079 gm

c) 83.4%