1. The problem statement, all variables and given/known data Want to prepare 450.0 mL of a 145 ppm K + ion solution. density of solution is 1.01 g/mL. solution is .728 M in K2SO4. How many mL of the K2SO4 solution need to use? 2. Relevant equations 3. The attempt at a solution (.728 mol/L K2SO4 )(1.01g/mL)(450.0 mL) i dont know what to do next...help?