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Calculating molar solubility... pleae help! WILL RATE BEST ANSWER!!?

Calculate the molar solubility of CuX (Ksp=1.27x10^-36) in each of the following.

1. pure water

2. 0.28 M CuCl2

3. 0.18 M Na2X

Thanks so much for any help you can provide!! :)

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1.27 x 10^-36 =(x)(x)

x = molar solubility=1.13 x 10^-18 M

1.27 x 10^-36 = (0.28+x)(x)

x = 4.54 x 10^-36 M

1.27 x 10^-36 = (x)(0.18+x)

x = 7.06 x 10^-36 M

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