how do i calculate the molar solubility of AgBr in .10M NaBr?

Answer 1

AgBr<==> Ag^+ + Br^-
Ksp = (Ag^+)(Br^-) = ??look up in your text or tables.
solubility AgBr = y
(Ag^+) = y
(Br^-) = y from AgBr and 0.10 from NaBr so (Br^-) = y+0.10
Set up in Ksp expression above and solve for y.