* Manganese(III) indicates the manganese ion has a +3 charge (Mn³⁺).
* Sulfite is the polyatomic ion SO₃²⁻.
To balance the charges, we need two Mn³⁺ ions (2 x +3 = +6) and three SO₃²⁻ ions (3 x -2 = -6).
Therefore, the chemical formula for manganese(III) sulfite is Mn₂(SO₃)₃.