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MHT CET 202625 AprilEvening Shift
Exam
MHT CET
Year
2026
Date
25 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Ionic Equilibrium

MHT CET 2026 · 25 April · Evening Shift · Chemistry · Ionic Equilibrium

Find the pH of 0.02\ M\ HCl .

Find the pH of 0.02 M HCl0.02\ \text{M}\ \text{HCl}.

Options

  1. A1.71.7
  2. B2.72.7
  3. C1.51.5
  4. D2.52.5

Correct answer

A. 1.71.7

Step-by-step solution

HCl\text{HCl} is a strong acid and dissociates completely in aqueous solution.

[\textH+]=0.02 M=2×10−2 M[\textH^{+}] = 0.02\ \text{M} = 2 \times 10^{-2}\ \text{M}

pH=−log⁡10[\textH+]\text{pH} = -\log_{10}[\textH^{+}]

pH=−log⁡10(2×10−2)\text{pH} = -\log_{10}(2 \times 10^{-2})

pH=2−log⁡102\text{pH} = 2 - \log_{10} 2

Using log⁡102≈0.3\log_{10} 2 \approx 0.3:

pH=2−0.3=1.7\text{pH} = 2 - 0.3 = 1.7

Answer: 1.71.7
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