Neco 2025 Chemistry Question 42
Practice objective / multiple choice question 42 from the 2025 Neco Chemistry examination.
In a 0.500 L solution, 25.0 mL of \(0.200\) M \(\text{HCl}\) is mixed with 25.0 mL of \(0.200\) M \(\text{NaOH}\). The mixture is then diluted to the final volume and \(0.050\) mol of \(\text{Na}_2\text{CO}_3\) is added. Assuming complete neutralisation of the acid and base, calculate the pH of the final solution. Use \(K_{a1}=4.3\times10^{-7}\), \(K_{a2}=5.6\times10^{-11}\) for carbonic acid and \(K_w=1.0\times10^{-14}\).
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About This Question
This is Neco 2025 Chemistry Question 42. It is one of the objective questions from the 2025 Neco Chemistry examination.
Difficulty level: Medium .
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