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I want to make sure about number 1 that my calculation is right. The Ksp value i

ID: 500531 • Letter: I

Question

I want to make sure about number 1 that my calculation is right. The Ksp value is 5.06 X 10^-11. Post-laboratory Questions: Week 8, Determination of Ksp 5.06 1. Using your calculated value of Ksp determine the molar solubility of AgeCro Ag croA can dissolve 2X 3 5.06X 2. You determined the concentration of the Cro42- and used that concentration to help determine Ksp. What would happen to the value of Ksp (higher, lower, no change) if there was an error in your Spec20 and all of your measured values for Cro42- were o.12 AU too large? Why?

Explanation / Answer

1)

Ksp of Ag2CrO4 = 5.06 X 10^-11

Ag2CrO4 ------------------> 2 Ag+   +   CrO42-

                                            2 S               S

Ksp = [Ag+]^2[CrO42-]

5.06 X 10^-11 = S x (2S)^2

S = 2.33 x 10^-4 M

solubility of Ag2CrO4 = 2.33 x 10^-4 M

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