Which of the following compounds precipitates from a solution that has the concentrations indicated? (See Appendix J for Ksp values.) (a) CaCO3: [Ca2+] = 0.003 M, [CO32−][CO32−] = 0.003 M (b) Co(OH)2: [Co2+] = 0.01 M, [OH–] = 1 ×× 10–7 M (c) CaHPO4: [Ca2+] = 0.01 M, [HPO42−][HPO42−] = 2 ×× 10–6 M (d) Pb3(PO4)2: [Pb2+] = 0.01 M, [PO43−][PO43−]= 1 ×× 10–13 M

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Chapter4: Reactions In Aqueous Solution
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Problem 78QAP: When 85.0 mL of 0.250 M Ba(OH)2 solution is added to 85.00 mL of 0.250 M Al (NO3)3 solution, a white...
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31) Which of the following compounds precipitates from a solution that has the concentrations indicated? (See Appendix J for Ksp values.)

(a) CaCO3: [Ca2+] = 0.003 M, [CO32−][CO32−] = 0.003 M

(b) Co(OH)2: [Co2+] = 0.01 M, [OH] = 1 ×× 10–7 M

(c) CaHPO4: [Ca2+] = 0.01 M, [HPO42−][HPO42−] = 2 ×× 10–6 M

(d) Pb3(PO4)2: [Pb2+] = 0.01 M, [PO43−][PO43−]= 1 ×× 10–13 M

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