What concentration of SO2−3 is in equilibrium with Ag2SO3(s) and 2.20×10−3 M Ag+ ?

Answer 1

Ag2SO3(s) ==> 2Ag+(aq) + SO32-(aq)

Ksp = [Ag⁺]²[SO₃^2-]

Look up the Ksp for Ag2SO3 and plug it in to the following equation:

Ksp = (2.2x10^-3)²(x)

Solve for x and that will give you the answer