### All AP Chemistry Resources

## Example Questions

### Example Question #1 : Solubility And Equilibrium

Calculate the molar solubility of AgBr in 0.050 M AgNO_{3} at room temperature. The K_{sp} of AgBr is 5.4 x 10^{-13.}

**Possible Answers:**

1.57 x 10^{-12} M

1.08 M

2.16 M

2.16 x 10^{-11} M

1.08 x 10^{-11} M

**Correct answer:**

1.08 x 10^{-11} M

### Example Question #2 : Solubility And Equilibrium

Would the molar solubility of Cr(OH)_{3} increase or decrease as the pH is lowered (i.e. made more acidic)?

**Possible Answers:**

Can not be determined

Increase

There is no change

Decrease

**Correct answer:**

Increase

Since Cr(OH)_{3} is a basic salt, decreasing the pH makes it more soluble.

### Example Question #1 : Solubility And Equilibrium

Calculate the molar solubility of SrF_{2} in 0.023M NaF. The K_{sp} for SrF_{2} is 4.3 x 10^{-9}.

**Possible Answers:**

5.2 x 10^{-4} M

8.1 x 10^{-6} M

3.2 x 10^{-3} M

3.2 x 10^{-5} M

1.6 x 10^{-3 } M

**Correct answer:**

8.1 x 10^{-6} M

### Example Question #1 : Solubility And Equilibrium

Calculate the molar solubility of Mn(OH)_{2} at pH 9.5. The K_{sp} for Mn(OH)_{2} is 1.6 x 10^{-13}.

**Possible Answers:**

1.6 x 10^{-4} M

2.4 x 10^{-3} M

2.1 x 10^{-5 }M

1.5 x 10^{-3} M

3.5 x 10^{-4} M

**Correct answer:**

1.6 x 10^{-4} M

### Example Question #1 : Solubility And Equilibrium

Calculate the molar solubility of CaF_{2 }(K_{sp } = 3.9 x 10^{-11}) in a room temperature solution of 0.010 M Ca(C_{2}H_{3}O_{2})_{2.}

**Possible Answers:**

1.6 x 10^{-2} M

3.7 x 10^{-4}^{ }M

3.1 x 10^{-5} M

3.2 x 10^{-2} M

4.2 x 10^{-4}M

**Correct answer:**

3.1 x 10^{-5} M

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