Gce Model Questions Vol1 2020 Chemistry Question 1
Practice objective / multiple choice question 1 from the 2020 Gce Model Questions Vol1 Chemistry examination.
An alloy contains copper and zinc by mass in the ratio 70 % Cu and 30 % Zn. The alloy is treated with excess dilute HCl, which dissolves only the zinc as ZnCl₂. The solution is then added to excess Na₂CO₃, precipitating ZnCO₃, which is filtered, dried and heated to convert it completely to ZnO. If the final mass of ZnO obtained is 2.34 g, calculate the original mass of the alloy (to three significant figures).
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About This Question
This is Gce Model Questions Vol1 2020 Chemistry Question 1. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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