# How do you filter a precipitate of calcium carbonate from an aqueous solution?

Perhaps by filtration thru $\text{Celite}$.....
Well, here, what works, works. You have a cloudy precipitate of $C a {\left(O H\right)}_{2}$/$C a C {O}_{3}$, the which will probably pass thru filter paper. $\text{Celite}$, aka $\text{Filter aid}$ is diatomaceous earth, and is commonly used to filter solutions.... And so you pass the solution (under suction) thru a frit lined with the stuff.....and the lined frit should retain the fine precipitate. Good luck.