Question

balance Na2SO3 + Br2 + H2O → Na2SO4 + HBr

Answer 1

Answer:

This is an oxidation-reduction (redox) reaction:

2 Br0 + 2 e- → 2 Br-I (reduction)

SIV - 2 e- → SVI (oxidation)

Br2 is an oxidizing agent, Na2SO3 is a reducing agent.