Chemistry > QUESTIONS & ANSWERS > University of Phoenix - CHM 151Chem 2 Homework Exercises. (All)
University of Phoenix - CHM 151Chem 2 Homework Exercises.
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Chem 2 Homework Exercises Ch. 15: 8, 14, 28, 54 Ch. 16: 4, 12, 16, 24 8. Write the ionic equation for dissolution and the solubility product (Ksp) expression for each of the following slig... htly soluble ionic compounds: (a) PbCl2 PbCl2(s) --> Pb2+(aq)+ 2Cl-(aq) Ksp = [Pb2+][Cl-]2 (b) Ag2S Ag2S(s) --> 2Ag+(aq)+ S2-(aq) Ksp =[Ag+]2[S2-] (c) Sr3(PO4)2 Sr3(PO4)2(s) --> 3Sr2+(aq)+ 2PO43-(aq) Ksp =[Sr2+]3[PO43-]2 (d) SrSO4 SrSO4(s) -->Sr2+(aq)+ SO42-(aq) Ksp =[Sr2+][SO42-] 14. Assuming that no equilibria other than dissolution are involved, calculate the molar solubility of each of the following from its solubility product: (a) Ag2SO4 The solubility product of Ag2SO4 is Ksp = 1.4 x 10-5Ksp =[Ag+]2[SO42-] Solubility, S is equal to [SO42-], so [Ag+] = 2S 1.5 x 10-5 = (2S)2x S = 4S3 S = 0.01554 mol/L (b) PbBr2 Ksp=4.0x10-5 Ksp= [Pb2+][Br-]2 S=[Pb2+] [Br-]=2S 4.0x10-5=S x (2S)2=4S3 [Show More]
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