Chemistry Coursework

Solution Calculation Practice

For each item make sure you show all of your work, indicate the units for every numerical expression and also express your answer in sig figs where appropriate.

Molarity

1) How many grams of potassium carbonate are needed to make 250 mL of a 4.5 M solution?

2) How many liters of 2 M solution can be made using 50 grams of lithium bromide?

3) What is the concentration of a 450 mL solution that contains 200 grams of iron (II) Iodide?

4) What is the concentration of a solution that has a volume of 2.5 L and contains 660 grams of Barium phosphate?

5) How many grams of copper (II) fluoride are needed to make 6.9 liters of a 1.2 M solution?

6) How many liters of 0.821 M solution can be made with 25.5 grams of lithium fluoride?

7) What is the concentration of a solution with a volume of 660 and contains 66.6 grams of aluminum acetate?

8) How many liters of 0.7521 M solution can be made using 75.00 grams of lead (II) oxide?

9) How many grams of manganese (IV) oxide are needed to make a 5.0 liters of a .1 M solution?

10) What is the concentration of a solution with a volume of 9 mL that contains 2 grams of iron (II) hydroxide?

Dilutions

1) If I have 540 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?

2) If I dilute 252 mL of 0.100 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?

3) If I leave 709 mL of 0.50 M sodium chloride solution uncovered on a windowsill and 151 mL of the solvent evaporates, what will the new concentration of the sodium chloride solution be?

4) To what volume would I need to add water to the evaporated solution in problem 3 to get a solution with a concentration of 0.25 M?