Part A: You have a stock solution of 14.8 M NH3. How many milliliters of this solution should you dilute to make 1000.0 mL of 0.250 M NH3?

Part B: If you take a 10.0 mL portion of the stock solution and dilute it to a total volume of .500 L, what will be the concentration of the final solution?

Glycerol, C3H8O2, is a substance used extensively in the manufacture of cosmetics, foodstuffs, antifreeze, and plastics. Glycerol is a water-soluble liquid with a density of 1.2656 g/L at 15 degrees Celsius. Calculate the molarity of a solution of glycerol made by dissolving 50.000 ML glycerol at 15 degrees Celsius in enough water to make 250.00 mL of solution.

A sample of solid Ca(OH)2 is stirred in water at 30 degrees Celsius until the solution icontains as much dissolved Ca(OH)2 as it can hold. A 100 mL sample of this solution is withdrawn and titrated with 5.00 x 10^-2 M HBr. It requires 48.8 mL of the acid solution for neutralization. What is the molarity of the Ca(OH)2 in water, at 30 degrees Celsius, in grams of Ca(OH) per 100 mL of solution?

A .5895 g sample of impure magnesium hydroxide is dissolved in 100.0 mL of .2050 M HCl solution. The excess acid then needs 19.85 mL of .1020 Na OH for neutralization. Calculate the percent mass of magnesium hydroxide in the sample, assuming that it is the only substance reacting with the HCl solution.