The solubility product of `CaF_(2) " is " 3.9 xx 10^(-11) " at " 25^(@) C `. What is the solubility of this salt in grams/litre of `0.1` M NaF solution ?

Explanation

To find the solubility of calcium fluoride (CaF₂) in grams per liter of a 0.1 M NaF solution, we will follow these steps:

### Step 1: Write the dissociation equations
Calcium fluoride (CaF₂) dissociates in water as follows:
\[ \text{CaF}_2 (s) \rightleftharpoons \text{Ca}^{2+} (aq) + 2\text{F}^- (aq) \]

Sodium fluoride (NaF) dissociates in water as:
\[ \text{NaF} (s) \rightleftharpoons \text{Na}^+ (aq) + \text{F}^- (aq) \]
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