2KCr(SO4)2 + H2 → 2CrSO4 + H2SO4 + K2SO4
2KCr(SO4)2 + 2[H] → 2CrSO4 + H2SO4 + K2SO4
Chromium(III)-potassium sulfate react with atomic hydrogen to produce chromium(III) sulfate, sulfuric acid and potassium sulfate.