Neco 2023 Chemistry Question 22
Practice objective / multiple choice question 22 from the 2023 Neco Chemistry examination.
A 1.20 g sample of a solid mixture of potassium carbonate (\( \mathrm{K_2CO_3} \)) and sodium carbonate (\( \mathrm{Na_2CO_3} \)) is treated with excess 0.200 M HCl (100 mL). The excess acid is then back‑titrated with 0.100 M NaOH, requiring 10.0 mL to reach the endpoint. Determine the mass percent of \( \mathrm{K_2CO_3} \) in the original mixture.
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About This Question
This is Neco 2023 Chemistry Question 22. It is one of the objective questions from the 2023 Neco Chemistry examination.
Difficulty level: Hard .
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