Neco 2024 Chemistry Question 4
Practice objective / multiple choice question 4 from the 2024 Neco Chemistry examination.
A weak acid HA has \(K_a = 1.8\times10^{-5}\). Its sodium salt NaA is completely soluble. In 1.00 L of water 0.50 g of HA (M = 60 g mol⁻¹) and 0.735 g of NaA (M = 82 g mol⁻¹) are dissolved.\n(a) Calculate the pH of the resulting buffer solution using the Henderson-Hasselbalch equation.\n(b) How many milliliters of 0.10 M HCl must be added to lower the pH by exactly 0.50 units? Give your answer to two significant figures.
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About This Question
This is Neco 2024 Chemistry Question 4. It is one of the objective questions from the 2024 Neco Chemistry examination.
Difficulty level: Medium .
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