1) A 290 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution?
2) A 130 mL stock solution contains 1.5 M CuF2. When 15 mL of the stock solution is diluted to 23 mL, what will the concentration of F- ions be?
3) A stock solution is prepared by adding 25 mL of 1.7 M Na2SO4 to enough water to make 40 mL. How many moles of Na+ are in 10 mL of the stock solution?
4) A stock solution is prepared by adding 25 mL of 1.4 M Pb(ClO3)2 to enough water to make 57 mL. How many moles of ClO3- are in 30 mL of the stock solution?
5) How many milliliters of a 95 mL solution of 1.5 M K2SO4 must be used to make 65 mL of a solution that has a concentration of .71 M K+?
6) A 13 mL sample of a solution of Pb(ClO3)2 was diluted with water to 21 mL. A 15 mL sample of the dilute solution was found to contain 0.025 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
7) What is being calculated when the molarity of the solute in a solution is divided into the moles of a solute in the solution?