Question

For PbCl2, the Ksp = 1.7 x 10-5. What is the solubility of PbCl 2 in 1.0 M NaCl? O a. 4.1 x 10-3 M O b. 2.6 x 10-2 M O c. 1.6 x 10-2 M O d. 1.7 x 10-4 M O e. 1.7 x 10-5 M

Answer 1

Que for Ploch, the ksp = 1.7x10 what is the solubility of pock in 1:0 M Nael. solution - option-@ conect 1.7x10 M Let the solubility of Pbch in paturated solution be x. Then according to expression q solubility product constant Phcl - Pb2+ + 20 . Ksp = {Pb 2+ ] [cſ] ² Ksp = [] [2x]? Ksp = 4x3 107x105 4x3 117x105 3 - 0.425 * 105 = x3 4.25 x 100 = x² 3425x100 X = 1:60 x 10 moles per lit od perlit The initial solubility oq pbch in water B 1.61 X10 * Lets find the solubility of pocke in presence of IM Nach Nady B strong eledroppe T ionizes compléteby

Thus Nad > Nat + á înitial moles IM IM motes at ega Thus concentration of a coming from Nac (1:0M) B vorge Jarge as compaired to ca] "coming from Soch (1.61 x 162m). 90 Lei] coming from pock can be neglected. Ksp = [Pb2+ ] [4] 2 The value g rep remaid constant. so the concentration of [ Pb2t] under nero condition with represend the solubility of Pbch. 2 1.70x105 = (pb277 ( 101 1.70 x 1025 [10]² - [Pb2t] [Pb 2+ 1.78 x10 mot pero litre Therefore solubility of pbcl in to rl Nad is 1.70 x 10 mol/lit