Neco Model Questions Vol1 2025 Chemistry Question 9
Practice objective / multiple choice question 9 from the 2025 Neco Model Questions Vol1 Chemistry examination.
A 0.025 M solution of an unknown monoprotic weak acid HA (a carboxylic acid) is titrated with 0.10 M NaOH. At the half‑equivalence point the measured pH is 4.75.\n(a) Determine the pK_a of HA.\n(b) Given that the molecular formula of HA is C₃H₆O₂, identify the acid.\n(c) Calculate the pH of a 0.10 M solution of this acid at 25 °C.
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This is Neco Model Questions Vol1 2025 Chemistry Question 9. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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