Neco 2019 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2019 Neco Chemistry examination.
A 5.00 g sample of a brass alloy containing only copper and zinc is dissolved in excess nitric acid. The resulting solution is treated with excess sodium hydroxide, which precipitates copper(II) hydroxide \( \mathrm{Cu(OH)_2} \) while zinc(II) hydroxide remains soluble. After filtration and drying, 1.28 g of the precipitate is obtained. Determine the mass percent of copper in the original alloy.
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About This Question
This is Neco 2019 Chemistry Question 33. It is one of the objective questions from the 2019 Neco Chemistry examination.
Difficulty level: Hard .
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