Question

One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to deposite 1.00x10^2 mg of CaCO3

Answer 1

First, you need to find the solubility of calcium carbonate in water. FOR EXAMPLE, if it's 10g/1L, you can only dissolve 10g of calcium carbonate in 1L of water.

Then, you dissolve \[1.00\times10^{2}\]mg of CaCO3 into more water, enough to saturate that solution. Then you combine both solutions, and then evaporate the amount of water in your second solution! :)