Calculate the mass (g) of solid potassium carbonate (K2CO3) needed to prepare 50 mL of a 1.0 M potassium carbonate solution. (This is the 1.0 M K2CO3 solution that you will use in your pigment synthesis.) There are several ways to approach this. Perhaps the easiest is to first determine the moles of K2CO3 in 50 mL of 1.0 M K2CO3 solution and then calculate the mass (g) of K2CO3 that corresponds to the moles.