Practice Problem 3

Use half-reactions to balance the equation for the reaction between sulfur dioxide and the dichromate ion in acidic solution.

Answer

Cr₂O₇^2-(aq) + 3 SO₂(aq) + 2 H⁺(aq) 2 Cr³⁺(aq) + 3 SO₄^2-(aq) + H₂O(l)