Chemistry Practice Problems Strong Acid-Base Calculations Practice Problems Solution: What is the pH of a solution made by mixing 100.0 ...

Solution: What is 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? Assume that the volumes are additive. Enter your answer with two decimal places.a. 0.87b. 2.70c. 3.50d. 1.10e. 0.52

Problem

What is 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? 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

Solution

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:

pH=-log H+

Take note that:         [H+] = [H3O+]


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

Step 1. Calculate the total moles of H3O+ ions in the solution.
Step 2. Calculate the total volume of the solution (in L).
Step 3. Calculate the total concentration of H3O+ ions in the solution.
Step 4. Calculate the pH of the solution.

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