Molarity Practice Worksheet

Molarity Practice Worksheet

Read each question carefully and provide your answers in the space provided. Show all your work for calculations.

1. Calculate the molarity of a solution prepared by dissolving 25.0 g of NaOH (molar mass = 40.00 g/mol) in enough water to make 500.0 mL of solution.

2. How many grams of potassium chloride (KCl, molar mass = 74.55 g/mol) are needed to prepare 2.5 L of a 0.50 M solution?

3. Molarity is defined as the number of   of solute per liter of  .

4. To increase the concentration (molarity) of a solution, you can either add more   or decrease the volume of the  .

5. Which of the following glassware is most appropriate for preparing a solution of a precise molarity?

6. A 1.0 M solution of NaCl contains:

7. If you have 250.0 mL of a 6.0 M HCl solution, and you dilute it to a final volume of 1.0 L, what is the new molarity of the solution?

8. How much water must be added to 100.0 mL of a 0.75 M stock solution to prepare a 0.25 M solution?

9. Describe the steps you would take to prepare 250.0 mL of a 0.10 M CuSO₄ solution in a laboratory. You have solid CuSO₄ (molar mass = 159.61 g/mol) and distilled water available. Include the necessary equipment.