chemistry
posted by Elaine .
What volume of water would be required to dilute a 10.0 mL 0.650 M solution of calcium sulfate to create 0.25 M solution, what would the volume of the new solution be?

mLa x Ma = mbL x Mb
Solve for mL which will be the final volume. Assuming the volumes are additive, the ADDED water will be final volume  10 mL.