Determine the sulfate ion concentrate in a solution prepared by diluting 15.00 ml of 0.115 M Y2(so4)3 with 35 ml of water?
Assuming solution density is sufficiently close to that of water.
3 * (0.115M) * 15.00 mL / (15.00 + 35 mL)
3 * (0.115M) * 15.00 mL / (15.00 + 35 mL)