alleryThe pH of a 0.01 M HCl solution is:
A1
B2
C7
D12
Answer & Solution
Correct answer: B. 2
1. HCl is a strong acid; fully dissociates: [H⁺] = 0.01 M = 10⁻².
2. pH = −log [H⁺] = −log(10⁻²) = 2.
3. Pure water has pH 7; pH 1 would be 0.1 M HCl.
_Source: syllabus Chem Ch 7 §7.10 pH Scale_
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