AIPMT PRELIMS2007Chemistry-Acids and Bases
AIPMT PRELIMS 2007 Chemistry pH Calculations MCQ Question
Type: MCQ-numerical-Medium-Class 11
Calculate the pH of a solution at 25°C that contains 1×10⁻¹⁰ M of hydronium ions, i.e., H₃O⁺.
A
4.000
B
9.000
C
1.000
D
7.000
Correct Answer
Option D
Detailed Explanation
At 25°C, the concentration of H₃O⁺ in pure water is 1×10⁻⁷ M. The given concentration is less than this, so the pH is determined by the autoionization of water, resulting in a pH of 7.
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