An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would
(Given log 2 = 0.30)

[JEE Main 2025, 7 Apr (Shift 1)]

Question

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would (Given log 2 = 0.30) [JEE Main 2025, 7 Apr (Shift 1)]

YESPYQ · Accepted Answer

Correct answer: b) increase to 1.3. Initial pH = 1 [H⁺] = 10⁻¹ M After adding equal volume of water → concentration becomes half New [H⁺] = (10⁻¹) / 2 pH = −log(10⁻¹ / 2) pH = −[log(10⁻¹) − log(2)] pH = −[−1 − 0.30] pH = 1 + 0.30 pH = 1.30

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The …

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