Question

HCM The K., of PbBr, is 6.60 x 10-6. What is the molar solubility of PbBr, in pure water? molar solubility: 1.18 x10-2 What is the molar solubility of PbBr, in 0.500 M KBr solution? molar solubility: What is the molar solubility of PbBr, in a 0.500 M Pb(NO), solution? molar solubility:

Answer 1

K sp = 6:60.x10-6 1) - Molar solubility of Pb Bra in pure water, - . A. PbBr2 cap) = Pb2+ + 2 Br o o : initially. 3. S . s . 25. dissocation I-S s.:25 finally. о K ob 1Pb2+ ] [ 37.)? ; ( Pb 13 Y21 as, PbBr is very sparingly soluble Ksp = [Pb2+ ] [ Br]? : $:(25)? 345? 656x166..453 S 1.65.x10-6 ts=1:18 x 10 ?M/2, molar solubility a Sa Molar solubility: : ECS Scanned with CamScanner

B. Pbby, PB+2382 0 0.5 initially S S 25 disociation i- s s (0.5+25) finally, Ksp = (pbº']9.15%*)? S: (0-5+25)? .- as cois is very very small 0.5+23 a 0.5 . Kspa SX 0:5. 80.5 616X10560.25 XS Es= 2614.8160M molar solubility, -> As kBr' is strong electolyte, it completely dissociate and now concentration of Br will be sum of ions from KBr and Pb B&z. Scanned with CamScanner

C. .Pb Br, T Pb2+ + 2Br. R 0.5 : o : . s . 25 0.5+5 as 1. S Ins. initially dissociation finally, KP : [Psv1 87 ] 606x10-6 = (0:5+) x(25)? 48? (0:5+5)* again as s' is very very small, 0-5+5 -0.5 616 x 10 bm 48? x 0-5 sepse 6.6810 6 = 2.52 9 $ = 3.3 X106 .7 psa 181x1013 M.TR . Molar solubility, - As Pb(NO3)3 is strong electolyte, it completely dissouate and new concentration ... of Pb2+ will be sum of ions from Pb(NO3), and Pb Brzi ... Scanned With CamScanner