Neco 2020 Chemistry Question 42

Practice objective / multiple choice question 42 from the 2020 Neco Chemistry examination.

Neco 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 42 NECO • 2020 • CHEMISTRY • objective

Oxalic acid (\(\text{H}_2\text{C}_2\text{O}_4\)) reacts with potassium permanganate in acidic medium according to the balanced equation \(2\text{MnO}_4^- + 5\text{C}_2\text{O}_4^{2-} + 16\text{H}^+ \rightarrow 2\text{Mn}^{2+} + 10\text{CO}_2 + 8\text{H}_2\text{O}\). A sample containing 25.0 mL of 0.200 M KMnO₄ is mixed with 30.0 mL of 0.150 M oxalic acid solution. (a) Identify the limiting reagent. (b) Calculate the volume of carbon dioxide gas produced at STP (22.4 L·mol⁻¹).

Answer Options

A. Oxalic acid is limiting; CO₂ volume ≈ 0.250 L (250 mL) at STP
B. Potassium permanganate is limiting; CO₂ volume ≈ 0.202 L (202 mL) at STP
C. Potassium permanganate is limiting; CO₂ volume ≈ 0.168 L (168 mL) at STP
Correct Answer D. Oxalic acid is limiting; CO₂ volume ≈ 0.202 L (202 mL) at STP
Correct Answer
D
Correct Option:
Oxalic acid is limiting; CO₂ volume ≈ 0.202 L (202 mL) at STP

About This Question

This is Neco 2020 Chemistry Question 42. It is one of the objective questions from the 2020 Neco Chemistry examination.

Difficulty level: Medium .

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