# Worksheet: Common Ion Effects

In this worksheet, we will practice using the solubility product to calculate the impact of a common ion on the dissolution or precipitation of a salt.

Q1:

In a solution of 0.025 M in contact with solid , what is at equilibrium? The of is .

• A M
• B M
• C M
• D M
• E M

Q2:

The solubility product of is . What mass of this salt will dissolve in 1.0 L of a solution with a concentration of 0.010 M?

Q3:

In a 0.00133 M solution of in contact with solid , what is at equilibrium? The of is Give your answer to two significant figures.

• A M
• B M
• C M
• D M
• E M

Q4:

What is the concentration of sulfate ions when just begins to precipitate from a solution that is 0.0758 M in ? The of is .

• A M
• B M
• C M
• D0.0758 M
• E M

Q5:

What is the concentration of when starts to precipitate from a solution with an concentration of 0.0125 M? The of is Give your answer to two significant figures.

• A M
• B M
• C M
• D M
• E M

Q6:

What is the concentration of when starts to precipitate from a solution that is 0.0035 M in ? The of is . Give your answer to two significant figures.

• A M
• B M
• C M
• D M
• E M

Q7:

For 0.500 L of a solution containing 19.50 g of in contact with solid , what is at equilibrium to two significant figures? The of is .

• A M
• B M
• C M
• D M
• E M

Q8:

A sample of () is contaminated with 0.1 g of (). The sample is treated with the minimum amount of water required to completely dissolve the . Noting that the two carbonate salts dissolve in the same volume of water, calculate the mass of that is also washed away.

• A g
• B g
• C g
• D g
• E g

Q9:

A solution contains 0.010 M of both and . Sulfide ions are added to the solution until ‎ of the ions have been precipitated as . Calculate the percentage of ions remaining in the solution. The value of is and that of is .

Q10:

In a solution of 0.025 M in contact with solid , what is at equilibrium? The of is Give your answer to two significant figures..

• A M
• B M
• C M
• D M
• E M

Q11:

In 2.250 L of solution containing 8.156 g of in contact with solid , what is at equilibrium? The of is Give your answer to two significant figures.

• A M
• B M
• C M
• D M
• E M

Q12:

In a solution of 0.0313 M in contact with solid , what is at equilibrium? The of is . Give your answer to three significant figures.

• A M
• B M
• C M
• D M
• E M

Q13:

How many grams of will dissolve in 500 mL of a 0.050 M solution?

• A g
• B0.16 g
• C g
• D g
• E g

Q14:

A solution contains all of the following carbonates at the same concentration. If is gradually increased, which carbonate is first to precipitate?

• A
• B
• C
• D
• E

Q15:

A solution contains all of the following carbonates at the same concentration. If is gradually increased, which carbonate is last to precipitate?

• A
• B
• C
• D
• E

Q16:

Which of the following, if added to a mixture of solid and water at equilibrium, would decrease the solubility of ?

• A
• B
• C
• D
• E

Q17:

Which of the following, if added to a mixture of solid and water at equilibrium, would increase the solubility of ?

• A
• B
• C
• D
• E

Q18:

A mixture of , , and contains 350 mg of each of the salts. What volume of 1.50 M aqueous is required to dissolve this solid material?

Q19:

If solid were dissolved in 0.01 M aqueous solutions of the following compounds, in which solution would the most solid dissolve per unit volume?

• A
• B
• C
• D
• E

Q20:

is added to a 0.125 M solution of until the solubility limit of 0.100 M is reached. The solutes react to form according to the following equations. Adding acid to the solution causes precipitation of the product. To 2 decimal places, at what pH does begin to precipitate?