Calculate \( \mathrm{F}^{-} \)in a solution saturated with respect of both \( \mathrm{MgF}_{2} \...

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Calculate \( \mathrm{F}^{-} \)in a solution saturated with respect of both \( \mathrm{MgF}_{2} \) and \( \mathrm{SrF}_{2}, \mathrm{~K}_{\mathrm{sp}}\left(\mathrm{MgF}_{2}\right)=9.5 \mathrm{X} 10^{-9} \), \( \mathrm{K}_{\mathrm{sp}}\left(\mathrm{SrF}_{2}\right)=4 \times 10^{-9} \).
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