Answer to Question #130801 in General Chemistry for Awwalia

Question

Balance the following equation for the redox reaction with the oxidation number method
NaI (aq) + H2SO4 (aq) -----> Na2SO4 (aq) + H2S (g) + I2 (s) + H2O (l)

Answer 1

2 NaI (aq) + 2 H2SO4 (aq)→ I2 (aq) + SO2 (aq) + Na2SO4 (aq) + 2 H2O (l)  

 Total ionic equation:

2 Na+ (aq) + 2 I‐ (aq) + 4 H+ (aq) + 2 SO4 2‐ (aq)→ I2 (aq) + SO2 (aq) + 2 Na+ (aq) + SO4 2‐ (aq) + 2 H2O (l)

Spectator ions: 2Na+ (aq), SO4 2‐ (aq)

Net ionic equation: 2 I‐ (aq) + 4 H+ (aq) + SO4 2‐ (aq)→ I2 (aq) + SO2 (aq) + 2 H2O (l