Neco 2017 Chemistry Question 14
Practice objective / multiple choice question 14 from the 2017 Neco Chemistry examination.
A 0.250 g sample of impure calcium carbonate is treated with excess 0.150 M hydrochloric acid (25.0 mL). The excess acid is then back‑titrated with 0.100 M sodium hydroxide, requiring 12.5 mL of NaOH. Calculate the percent purity of CaCO_{3} in the original sample.
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About This Question
This is Neco 2017 Chemistry Question 14. It is one of the objective questions from the 2017 Neco Chemistry examination.
Difficulty level: Hard .
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