University of Nebraska at K x www.saplinglearning.com/i X C ning.com, id 2491775

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University of Nebraska at K x www.saplinglearning.com/i X C ning.com, id 2491775 General Chemist University Science Books ap Edition presented by Sapling Learning Donald McQuarrie. Peter A. Rock. Ethan Gallogly 90 Silver chromate is sparingly soluble in aqueous solutions. The Ksp of Ag2Cro4 is 1.12x 10 2 100 What is the solubility (in mol/L) of silver chromate (a) in 1.50 M potassium chromate aqueous solution? Number M 100 (b) in 1.50 M silver nitrate aqueous solution? Number M 100 (c) in pure water? click to edit Number M A a Previous Q Give up R view salutinn Check Answer Next Exit

Explanation / Answer

Ag2CrO4 ------> 2 Ag+ + CrO-2
Ksp = 1.2 * 10^-12
in K2CrO4 solution,
solubility of CrO4-2 = (S + 1.5)
solubility of Ag+ = 2s
Ksp = [Ag+]^2 [CrO4-2]
1.2*10^-12 = (2s)^2 (s +1.5)
Sloubility = 4.472 * 10^-7 M

In AgNO3 solution,
solubility of CrO4-2 = S
solubility of Ag+ = (2s + 1.5)
Ksp = [Ag+]^2 [CrO4-2]
1.2*10^-12 = (2s+1.5)^2 (s)
Sloubility = 5.33 * 10^-13 M

In pure water,
solubility of CrO4-2 = S
solubility of Ag+ = (2s)
Ksp = [Ag+]^2 [CrO4-2]
1.2*10^-12 = (2s)^2 (s)
Solubility s = 6.694 * 10^-5 M

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