Any help/explanations for the answers to these questions would be super helpful.

Question

Any help/explanations for the answers to these questions would be super helpful. I have also provided the answers for each. Thank you so much.

1.) At 200C a saturated solution of Ag2CO3 contains 32mg of Ag2CO3 per Liter of solution. Calculate the Ksp of Ag2CO3. [Ans: 6.3 x 10-12 ]

2.) Ksp of Calcium Fluoride is 3.45 x 10-11. Calculate the molar solubility of Calcium Fluoride in a solution that is:

a) 0.010M in Ca(NO3)2           b) 0.010M NaF   [Ans: a) 3.1x10-5,   b) 3.9x10-7]

3.) Calculate the solubility of Ag3AsO4, given that the Ksp of Ag3AsO4 is 1 x 10-2    [Ans: 1.4 x 10-6M]

Explanation / Answer

Dear student,

1) Ksp for Ag2CO3 = (2s)2*(s)= 4s3 , where s = solubility = 0.032/275.74 mol/L = 1.1*10-4 mol/L

Ksp= 4*(1.1*10-4)3 = 5.32*10-12

2) Ksp for CaF2 = 4s3 = 3.45*10-11

s3 = 8.625*10-12

s = 2.05*10-4 g/L

3) Ksp of Ag3AsO4 = (3s)3*(s) = 27s4 = 1*10-22

s4 = 0.037*10-22

s = 1.4*10-6 mol/L

Regards

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