Neco 2021 Chemistry Question 8
Practice objective / multiple choice question 8 from the 2021 Neco Chemistry examination.
An impure sample of sodium carbonate weighing 0.250 g is dissolved in water. To the solution 25.0 mL of 0.100 M HCl is added in excess. The excess acid is then back‑titrated with 0.080 M NaOH, requiring 12.5 mL to reach the endpoint. Calculate the percent purity of Na₂CO₃ in the original sample.
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About This Question
This is Neco 2021 Chemistry Question 8. It is one of the objective questions from the 2021 Neco Chemistry examination.
Difficulty level: Hard .
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