Neco Model Questions Vol1 2022 Chemistry Question 11
Practice objective / multiple choice question 11 from the 2022 Neco Model Questions Vol1 Chemistry examination.
A lake has a volume of \(2.0 \times 10^{6}\) L and an initial pH of 7.5. Acid rain adds a total of \(5.0 \times 10^{4}\) mol of \(\mathrm{H^{+}}\) uniformly to the lake water. To restore the lake to its original pH, limestone (\(\mathrm{CaCO_{3}}\)) is added, which reacts according to \(\mathrm{CaCO_{3} + 2H^{+} \rightarrow Ca^{2+} + CO_{2} + H_{2}O}\). Calculate the mass of limestone required (in kilograms) to bring the pH back to 7.5.
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This is Neco Model Questions Vol1 2022 Chemistry Question 11. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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