Answer to Question #227986 in Chemistry for Ayola

Question

Balance HNO₃ + Cu = Cu (NO₃)₂ ,+NO₂ + H₂O

Answer 1

Solution:

Unbalanced chemical equation

HNO₃ + Cu → Cu(NO₃)₂ + NO₂ + H₂O

Cu^o - 2e → Cu²⁺ (oxidation)

N⁺⁵ + e → N⁺⁴ (reduction)

Cu^o + 2N⁺⁵ → Cu²⁺ + 2N⁺⁴

Balanced chemical equation:

4HNO₃ + Cu → Cu(NO₃)₂ + 2NO₂ + 2H₂O