What is the pH of a solution of a strong monoprotic acid like HCl?

Answer and explanation

Correct answer: C. 1

  1. Step 1: For a completely dissociated strong acid like , .
  2. Step 2: Use the pH formula: .
  3. Step 3: Computing directly gives .
Answer
1.
Why not the others: 2 underestimates hydrogen ion acidity; 0 corresponds to a strong acid solution; 13 is the pOH () rather than pH.

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