Igcse Model Questions Vol1 2025 Chemistry Question 11
Practice objective / multiple choice question 11 from the 2025 Igcse Model Questions Vol1 Chemistry examination.
A 25.0 mL sample of a monoprotic weak acid HA is titrated with 0.100 M NaOH. At the half‑equivalence point the measured pH is 4.75. After adding 30.0 mL of the NaOH solution the pH is 9.20. Assuming the solution volume changes only by the added titrant, calculate the initial concentration of the acid HA in mol L(^{-1}).
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This is Igcse Model Questions Vol1 2025 Chemistry Question 11. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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