What is the pH of a 0.01 M aqueous solution of Hydrochloric Acid (HCl)?
Answer and explanation
Correct answer: D. 2.0
- Step 1: HCl is a strong acid that dissociates completely: [H+] = 0.01 M = 10^(-2) M. Step 2. pH = -log[H+] = -log(10^(-2)) = 2.0. Answer: 2.0. Why not the others: 1.0 is the pH of a 0.1 M HCl solution; 3.0 is the pH of a 0.001 M HCl solution; 12.0 is the pOH of the 0.01 M solution.
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