Neco 2024 Chemistry Question 15
Practice objective / multiple choice question 15 from the 2024 Neco Chemistry examination.
A 0.500 g sample of an impure solid is suspected to contain calcium carbonate (\( \text{CaCO}_3 \)). The sample is treated with excess \(0.1500\ \text{M}\) hydrochloric acid, using \(25.00\ \text{mL}\) of the acid. After the reaction, the excess acid is back‑titrated with \(0.1000\ \text{M}\) sodium hydroxide, requiring \(12.35\ \text{mL}\) of the base. Calculate the percentage purity of calcium carbonate in the sample.
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About This Question
This is Neco 2024 Chemistry Question 15. It is one of the objective questions from the 2024 Neco Chemistry examination.
Difficulty level: Hard .
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