What is the pH of a 0.01 M HCl solution?

Practice Questions

Q1
What is the pH of a 0.01 M HCl solution?
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Questions & Step-by-Step Solutions

What is the pH of a 0.01 M HCl solution?
Correct Answer: 2
  • Step 1: Understand that HCl is a strong acid, which means it completely dissociates in water.
  • Step 2: Recognize that a 0.01 M HCl solution means there are 0.01 moles of HCl in 1 liter of water.
  • Step 3: Since HCl fully 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: Calculate the pH: pH = -log(0.01).
  • Step 6: Find the logarithm: log(0.01) = -2.
  • Step 7: Therefore, pH = -(-2) = 2.
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