Neco Model Questions Vol1 2018 Chemistry Question 47
Practice objective / multiple choice question 47 from the 2018 Neco Model Questions Vol1 Chemistry examination.
A 1.00 L solution initially contains 0.250 mol of the weak acid HA and 0.150 mol of its sodium salt NaA. The solution is titrated with 0.100 M NaOH. After adding 12.5 mL of NaOH, the pH becomes 5.00. Assuming the acid dissociation follows HA \rightleftharpoons H^{+}+A^{-}, determine the pK_{a} of HA.
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About This Question
This is Neco Model Questions Vol1 2018 Chemistry Question 47. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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