We're being asked to calculate the pH of a solution made by mixing 100.0 mL of 0.10 M HNO3, 50.0 mL of 0.20 M HCl, and 100.0 mL of water.

• **pH**

▪ pH stands for the negative logarithmic function of hydronium ion concentration**▪** can be calculated using the following equation:

$\overline{){\mathbf{pH}}{\mathbf{=}}{\mathbf{-}}{\mathbf{log}}{\mathbf{}}\left[{\mathbf{H}}^{\mathbf{+}}\right]}$

Take note that: **[H ^{+}] = [H_{3}O^{+}]**

We're going to calculate the pH of the solution using the following steps:

**Step 1.** Calculate the total moles of H_{3}O^{+} ions in the solution.**Step 2. **Calculate the total volume of the solution (in L).**Step 3.** Calculate the total concentration of H_{3}O^{+} ions in the solution.**Step 4. **Calculate the pH of the solution.

What is the pH of a solution made by mixing 100.0 mL of 0.10 M HNO_{3}, 50.0 mL of 0.20 M HCl, and 100.0 mL of water? Assume that the volumes are additive. Enter your answer with two decimal places.

a. 0.87

b. 2.70

c. 3.50

d. 1.10

e. 0.52

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Strong Acid-Base Calculations concept. If you need more Strong Acid-Base Calculations practice, you can also practice Strong Acid-Base Calculations practice problems.