$10.$How many grams of $CaC{O}_3$ will dissolve in $3\mathrm{.}0{10}^{2}mL$ of $0\mathrm{.}050$MCa$(N{O}_3{)}_2?($This one is tricky! You will need to solve for the solubility by using the quadratic equation.$)$

$11.$

What compound, if any, will precipitate when $80mL$ of $1\mathrm{.}0{10}^{-5}$MBa$(OH{)}_2$ is added to $20mL$ of $1\mathrm{.}0{10}^{-5}MF{e}_2(S{O}_4{)}_3?$

$12.$

"Hard" water contains alkaline earth cations such as $C{a}^{2+},$ which reacts with $C{O}_3^{2-}$ to form $CaC{O}_3.$ Will a precipitate of $CaC{O}_3$ form if a $250mL$ sample of hard water having a $[C{a}^{2+}]=8\mathrm{.}0{10}^{-4}M$ is treated with:

a$.0\mathrm{.}10mL$ of $2\mathrm{.}0{10}^{-3}MN{a}_{2}C{O}_3$

b$.,10mg$ of solid $N{a}_{2}C{O}_3$

$13.$

How would you chemically separate the following pairs of ions? See Table at the bottom of Lesson $3\mathrm{.}2$ for support here.

a$.A{g}^{+}$and $C{u}^{2+}$

b$.M{g}^{2+}$ and $M{n}^{2+}$

c$.N{a}^{+}$and $C{a}^{2+}$