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A generic salt, AB2, has a molar mass of 169 g/mol and a solubility of 1.60...

A generic salt, AB2, has a molar mass of 169 g/mol and a solubility of 1.60 g/L at 25

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Answer #1

Given: molar mass of AB2 = 169 g/mole

Solubility of AB2 is 1.60 g/L = (1.6 / 169) mol/L = 0.00946 M

Required: Calculate the Ksp for AB2

Solution:

1. Write Equation:                                AB2 (s) A2+ (aq) +2B- (aq)

2.  ICE chart                 Initial Conc.          -                   0                        0

                                    Change                 -                 +0.00946        +2(0.00946 )

                                    Equilibrium           -                   0.00946            0.01892

3.      Calculate Ksp

Ksp = [A2+][B-]2

Ksp = [0.00946][0.01892]2

Ksp = 3.386 X 10-6

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