Neco 2022 Chemistry Question 32

Practice objective / multiple choice question 32 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Hard Difficulty

Question 32 NECO • 2022 • CHEMISTRY • objective

A sample of 5.00 g of oxalic acid dihydrate \(\mathrm{C_2H_2O_4\cdot2H_2O}\) is reacted with excess methanol in the presence of concentrated \(\mathrm{H_2SO_4}\) to form dimethyl oxalate according to \(\mathrm{HOOC-COOH + 2\,CH_3OH \rightarrow CH_3OOC-COOCH_3 + 2\,H_2O}\). At equilibrium 75% of the oxalic acid is converted to dimethyl oxalate. Calculate the mass of dimethyl oxalate produced and then determine its mass percent in the final reaction mixture (including unreacted oxalic acid and water formed).

Correct Answer A. 3.51 g ; 60.2 %

B. 3.85 g ; 65.1 %

C. 2.98 g ; 51.3 %

D. 3.12 g ; 55.0 %

Correct Answer

Correct Option:

3.51 g ; 60.2 %

This is Neco 2022 Chemistry Question 32. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Hard .

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