Select all of the following that are true about the common ion effect for dissol

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.

Explanation / Answer

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.

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