6 KI (aq) + KClO3 (aq) + 3 H2SO4 (aq) → 3 I2 (s) + KCl (aq) + 3 K2SO4 (aq) + 3 H2O (l)
This is an oxidation-reduction (redox) reaction:
6 I-I - 6 e- → 6 I0 (oxidation)
ClV + 6 e- → Cl-I (reduction)
KI is a reducing agent, KClO3 is an oxidizing agent.
This is a precipitation reaction: I2 is the formed precipitate.