Chemistry Activity One-Using the pH Equation.

Student Worksheet

Use the pH equation to calculate either pH or the H+ concentration. Show all set-ups and label answers if required. Assume all solutions are at 25°C.

1. What is the pH equation? List all variables and explain what they represent, including their appropriate labels.

2. What is the pH of a solution that has a H+ concentration of 1.00 x 10^-2 M. Is this solution acidic or basic?

3. What is the concentration of hydrogen ions in a solution having a pH of 7.50? Is this solution acidic or basic?

4. A nitric acid solution contains 25.2 g of solute in 500.0 mL of solution. What is the molar concentration of the solution? What is the pH of the solution? Remember that

Molarity = moles solute/liter of solution.

5. What is the concentration of H+ ions in a solution having a pH of 9.609?

6. What is the concentration of H+ ion in a solution having a pH of 3.857? Is the solution an acid or a base?

7. Find the pH of a solution in which [H+] = 1.39 x 10^-4 M.

8. A solution has a pH reading of 0.61. What is the hydrogen ion concentration of the solution? Find the number of moles of solute in 2.50 L of the solution.

9. The pH of rainwater is 6.2 and the pH of tomato juice is 4.2. Compare the relative number of hydronium ions in rainwater and tomato juice.