Question

Consider this reaction: H2S + HNO3 Right arrow. S + NO + H2O
Reduction half-reaction: N+5 + 3e- Right arrow. N+2
Oxidation half-reaction: S-2 Right arrow. S + 2e-

After balancing the chemical equation, what are the coefficients for these compounds?

H2S

HNO3

Answer 1

Balance gives:

3 H2S + 2 HNO3 → 3 S + 2 NO + 4 H2O

So the coefficients are H2S = 3 and HNO3 = 2.