Question

Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal М(ОН), (8) — м?" (aq) + 2 ОН (аq) Кр — 6х 10-16 М(ОН), (s) + 2 ОН (аф) — [М(ОН), F (aq) Kt=0.08 Estimate the solubility of M(OH), in a solution buffered at pH 7.0, 10.0, and 14.0 solubility at pH 7.0 solubility at pH= 10.0 М М solubility at pH= 14.0 М

Answer 1

page:01 Ansons According to the given information, to find the following paroblems. Given, Mlotla.is) = Mean) + aoh.caq.). : Klop = 6x106 --* Michlacs) + 20+120x) = {f+Cotu? . com Kp = 0.08 find solubility at pH-4:- det, Ksp : 6xiok pHaiti pH + pot a14 poh - 14-4 pol. 7 (OH) a antilog (-2) [CH] = 1x107

page: 02 = 6X1646 then, kesp - (Mat) Cour3? CM[oH2o] 6 x côté = (M24] x [157] 6x 106 amat} x 1x10th (M&+? - 6x 162 Mot} = 0.06M solubleby at p:+ 201064 * find solubility at pH = 10:- Led, PH₂ 1a . pH + poh a la poh a 14-10 portal then, fort] = antlog -u) [ot] a 1x04

then, page: 03 Keep = (Mat) Cotiza 6x1562 [Hat? [10472 [181] = 6x 108 m .solubility at pel :10 - 6x10%M * find solubility al pH = 14:- Al pH e u solubility a Kf Kf = 0.08 M i solubility at pH : 14 = 0.08M/