Ksp = [Ag +] [BrO3-],
we know that AgBrO3 is saturated, so if we find the solubility of Ag, we can refer
to BrO3, and also find the mole Ag.
H2S = 2H+ + S2-;
Ka = [H+]2[S2-]
2AgBrO3 + H2S = Ag2S + 2HBrO3;
2Ag+ + S2- = Ag2S;
Ksp = [Ag +]2[S2-]
10-50 = (2x)2 * x = 4x3
10-50/3 = 4x
X = 10-50/3/4