A solution is saturated with respect to `SrF_(2); K_(sp) = 7.9 xx 10^(-10)` and `SrCO_(3), K_(sp) = 7.0 xx 10^(-10)`. If the fluoride ion concentration is found to be `4.0 xx 10^(-2)M`. What is the concentration of carbonates ions.

Explanation

To solve the problem step by step, we need to find the concentration of carbonate ions \([CO_3^{2-}]\) in a saturated solution containing strontium fluoride \((SrF_2)\) and strontium carbonate \((SrCO_3)\).

### Step 1: Write the dissociation equations and Ksp expressions

1. **Dissociation of \(SrF_2\)**:
\[ SrF_2 \rightleftharpoons Sr^{2+} + 2F^{-} \]
...