Groundwater containing a high concentration of Ca ions is treated with Na CO during a…

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

Groundwater containing a high concentration of Ca

^{2+}

ions is treated with Na

_2

_3

during a water-softening process. Explain why adding CO

_3^{2-}

ions causes CaCO

_3

(s) to precipitate and thereby lowers the concentration of dissolved Ca

^{2+}

ions.