Question

1. When 15 mL of a solution containing .29 M Ca(OH)2 is diluted to32 mL, a dilute solution is formed. What is the OH- concentrationin 5 mL of the dilute solution?

2. A 110 mL stock solution contains 7 M BaCl2. When 27 mL of thestock solution is diluted to 75 mL, how many moles of Ba2+ ionswill be contained in the dilute solution?

3. A stock solution is prepared by adding 23 mL of 2.1 M Na2SO4 toenough water to make 40 mL. How many moles of Na+ are in 15 mL ofthe stock solution?