Igcse Model Questions Vol1 2019 Chemistry Question 31

Practice objective / multiple choice question 31 from the 2019 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Hard Difficulty

Question 31 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

A lake contains 0.020 mol of Pb^{2+} per litre. Sodium carbonate is added in excess so that the initial concentration of CO_{3}^{2-} is 0.10 mol L^{-1}. Lead(II) carbonate precipitates until equilibrium is reached with K_{sp}=1.5\times10^{-13}. Assuming the volume of the lake does not change, calculate the final concentration of Pb^{2+} in the lake water (in mol L^{-1}).

Answer Options

Correct Answer A. 1.9\times10^{-12} mol L^{-1}

B. 2.5\times10^{-12} mol L^{-1}

C. 3.0\times10^{-13} mol L^{-1}

D. 1.9\times10^{-10} mol L^{-1}

Correct Answer

Correct Option:

1.9\times10^{-12} mol L^{-1}

About This Question

This is Igcse Model Questions Vol1 2019 Chemistry Question 31. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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