Question

Select all of the following that are true about the common ion effect for dissolving solids.
1. Mg₃(PO₄)₂ will be more soluble in a 1.0 M solution of magnesium nitrate than in a 1.0 M solution of magnesium sulfate.

2. AgBr is more soluble in a 1.0 M solution of sodium bromide than it is in a 1.0 M solution of calcium bromide.

3. The common ion effect only works when adding anions.

4. CaCO₃ can be made more soluble by adding a soluble source of Ca²⁺ ion.

5. If you add potassium sulfate to a saturated solution of PbSO₄, more precipitate will form.

6. The addition of a soluble salt containing a common ion will decrease the solubility of a sparingly soluble salt.

Answer 1

2. AgBr is more soluble in a 1.0 M solution of sodium bromide than it is in a 1.0 M solution of calcium bromide.

1.0 M CaBr2   contain 2.0 M Br^-   so more the Bromide concentration lesser the solubility .

1.0 M NaBr contain 1.0 M bromide only.

5. If you add potassium sulfate to a saturated solution of PbSO₄, more precipitate will form.

by adding common ion solubility will decrease so more precipitate will form.

6. The addition of a soluble salt containing a common ion will decrease the solubility of a sparingly soluble salt.