Gce Model Questions Vol1 2022 Chemistry Question 30

Practice objective / multiple choice question 30 from the 2022 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 30 GCE_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

A 5.00 g sample of ethanol (\(C_2H_5OH\)) is oxidised by excess acidic potassium dichromate according to\n\n\(3 C_2H_5OH + 2 K_2Cr_2O_7 + 8 H_2SO_4 \rightarrow 3 CH_3COOH + 2 Cr_2(SO_4)_3 + 2 K_2SO_4 + 11 H_2O\).\n\nAfter the reaction the mixture is titrated with 0.100 M NaOH, requiring 25.0 mL to neutralise the produced acetic acid. Calculate:\n(a) the theoretical mass of acetic acid that could be obtained from the ethanol sample;\n(b) the percentage yield of acetic acid based on the titration.

Answer Options

A. Theoretical mass ≈7.20 g; percent yield ≈2.1 %
B. Theoretical mass ≈5.12 g; percent yield ≈3.1 %
Correct Answer C. Theoretical mass ≈6.51 g; percent yield ≈2.3 %
D. Theoretical mass ≈6.51 g; percent yield ≈1.5 %
Correct Answer
C
Correct Option:
Theoretical mass ≈6.51 g; percent yield ≈2.3 %

About This Question

This is Gce Model Questions Vol1 2022 Chemistry Question 30. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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