Neco 2017 Chemistry Question 24
Practice objective / multiple choice question 24 from the 2017 Neco Chemistry examination.
A 0.250 g sample of impure calcium carbonate is treated with excess 0.100 M HCl. After the reaction, the remaining acid is back‑titrated with 0.0800 M NaOH, requiring 12.5 mL of NaOH to reach the endpoint. If the volume of HCl initially added was 25.0 mL, determine the percent purity of CaCO₃ in the sample.
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About This Question
This is Neco 2017 Chemistry Question 24. It is one of the objective questions from the 2017 Neco Chemistry examination.
Difficulty level: Hard .
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