Seawater contains fluoride ion at approximately

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

Seawater contains fluoride ion at approximately 2.0×10−4 M2.0\times10^{-4}\,\text{M}. The solubility-product constant for MgF2_2 is 6.8×10−96.8\times10^{-9} at 25 °C. Determine the maximum magnesium-ion concentration (in M) that can be present without precipitating MgF2_2.

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