Igcse Model Questions Vol1 2023 Chemistry Question 31
Practice objective / multiple choice question 31 from the 2023 Igcse Model Questions Vol1 Chemistry examination.
An aqueous sample of 1.00 L contains 0.010 mol of Pb^{2+}. To reduce the concentration to 0.001 mol L^{-1}, a treatment plant adds a sodium sulfide solution of concentration 0.020 mol L^{-1}. The precipitation reaction is Pb^{2+} + S^{2-} \leftrightarrow PbS(s) with K_{sp}=8\times10^{-28}. Assuming the total volume after addition is the sum of the initial and added volumes, calculate the minimum volume of Na_{2}S solution required (in litres, to three significant figures).
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About This Question
This is Igcse Model Questions Vol1 2023 Chemistry Question 31. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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