Answer to Question #270807 in Physical Chemistry for Dolphy

Question

Balance the following equations using the change in oxidation number method.

(10 pts each)

1.

Fe

+

HNO3

⎯→

NO + Fe2O3

+ H2O

Balanced equation: _______________________________________________________

Substance oxidized:

(1 pt) ___________________

Substance reduced:

(1 pt) ___________________

Answer 1

2 Fe (s) + 2 HNO₃ (aq) → Fe₂O₃ (s) + 2 NO (g) + H₂O (l)

This is an oxidation-reduction (redox) reaction:

2 N^V + 6 e^- → 2 N^II

(reduction)

2 Fe⁰ - 6 e^- → 2 Fe^III

(oxidation)

HNO₃ is an oxidizing agent, Fe is a reducing agent