How many grams of CaC_2O_4 will dissolve in d | vedclass

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(A) The dissociation of $CaC_2O_4$ is given by: $CaC_2O_4(s) \rightleftharpoons Ca^{2+}(aq) + C_2O_4^{2-}(aq)$.Let the solubility be $s \, mol \, L^{-

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$0.0064$

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(A) The dissociation of $CaC_2O_4$ is given by: $CaC_2O_4(s) ightleftharpoons Ca^{2+}(aq) + C_2O_4^{2-}(aq)$.Let the solubility be $s \, mol \, L^{-1}$.Then,$K_{sp} = [Ca^{2+}][C_2O_4^{2-}] = s 	imes s = s^2$.Given $K_{sp} = 2.5 	imes 10^{-9}$.So,$s = \sqrt{2.5 	imes 10^{-9}} = \sqrt{25 	imes 10^{-10}} = 5 	imes 10^{-5} \, mol \, L^{-1}$.Mass of $CaC_2O_4$ dissolved in $1 \, L$ = $s 	imes 	ext{Molar Mass} = 5 	imes 10^{-5} \, mol \, L^{-1} 	imes 128 \, g \, mol^{-1} = 640 	imes 10^{-5} \, g = 0.0064 \, g$.

How many grams of $CaC_2O_4$ will dissolve in distilled water to make $1 \, L$ of a saturated solution (in $, g$)? The solubility product $(K_{sp})$ of $CaC_2O_4$ is $2.5 \times 10^{-9} \, mol^2 \, L^{-2}$ and its molar mass is $128 \, g \, mol^{-1}$.

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