Waec Model Questions Vol1 2024 Chemistry Question 45
Practice objective / multiple choice question 45 from the 2024 Waec Model Questions Vol1 Chemistry examination.
Five grams of chlorine gas (Cl₂, M = 70.90 g·mol⁻¹) is reacted with excess cold dilute NaOH solution according to the reaction:\n\[\text{Cl}_2 + 2\text{NaOH} \rightarrow \text{NaCl} + \text{NaClO} + \text{H}_2\text{O}\]\nAssuming the solution volume after reaction is 250 mL, calculate:\n(a) the mass of NaCl formed, and\n(b) the pH of the resulting solution, given that the hydrolysis of the hypochlorite ion follows \(\text{ClO}^- + \text{H}_2\text{O} \rightleftharpoons \text{HClO} + \text{OH}^-\) with \(K_a(\text{HClO}) = 3.5\times10^{-8}\). Provide the pH to one decimal place.
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This is Waec Model Questions Vol1 2024 Chemistry Question 45. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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