What is the pH of a 0.01 M hydrochloric acid solution?

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Question: What is the pH of a 0.01 M hydrochloric acid solution?

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Correct Answer: 1

Solution:

The pH of a strong acid like HCl can be calculated using the formula pH = -log[H+]. For 0.01 M HCl, pH = -log(0.01) = 2.

What is the pH of a 0.01 M hydrochloric acid solution?

What is the pH of a 0.01 M hydrochloric acid solution?

Step 1: Understand that hydrochloric acid (HCl) is a strong acid, which means it completely dissociates in water.
Step 2: Recognize that a 0.01 M solution of HCl means there are 0.01 moles of HCl in one liter of water.
Step 3: Since HCl completely dissociates, the concentration of hydrogen ions [H+] in the solution is also 0.01 M.
Step 4: Use the formula for pH, which is pH = -log[H+].
Step 5: Substitute the value of [H+] into the formula: pH = -log(0.01).
Step 6: Calculate the logarithm: log(0.01) is equal to -2.
Step 7: Therefore, pH = -(-2) = 2.

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