Neco 2020 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2020 Neco Chemistry examination.
A 1.250 g sample of an impure solid is dissolved in water and treated with 25.00 mL of 0.2000 M HCl. The excess acid is then back‑titrated with 0.1000 M NaOH, requiring 15.00 mL of the base. Determine the percentage purity of Na₂CO₃ in the sample. (Molar mass Na₂CO₃ = 105.99 g mol⁻¹).
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About This Question
This is Neco 2020 Chemistry Question 33. It is one of the objective questions from the 2020 Neco Chemistry examination.
Difficulty level: Hard .
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