Gce Model Questions Vol1 2023 Chemistry Question 3
Practice objective / multiple choice question 3 from the 2023 Gce Model Questions Vol1 Chemistry examination.
A 10.0 g sample of a mixture of ethanol (\(\mathrm{C_2H_5OH}\), \(M=46.07\) g·mol⁻¹) and 2‑propanol (\(\mathrm{C_3H_7OH}\), \(M=60.10\) g·mol⁻¹) is completely oxidised by excess acidified potassium dichromate. The reduction of dichromate produces \(0.130\) mol of \(\mathrm{Cr^{3+}}\). Assuming each mole of alcohol donates two electrons in the oxidation, determine the mass percentages of ethanol and 2‑propanol in the original mixture.
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This is Gce Model Questions Vol1 2023 Chemistry Question 3. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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