1. The problem statement, all variables and given/known data A solution 200mL solution has 1g/L of a solid dissolved in it. After boiling, there is only 136mL remaining. How much of the dissolved substance is left? I figured that if C1V1=C2V2, then if the concentrations were equal after calculation, i could the concentration after from the concentration before so that C2=(C1V1)/V2 thus converting the concentration to grams afterwards and subtracted that value from the previous one.