Igcse Model Questions Vol1 2017 Chemistry Question 36

Practice objective / multiple choice question 36 from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 36 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

A 250 cm³ sample of 0.200 M FeSO₄ solution is electrolysed at a constant current of 0.250 A for 30 minutes. The cathode reaction is \(\text{Fe}^{2+} + 2e^- \rightarrow \text{Fe(s)}\). Assuming 100 % current efficiency, (a) calculate the mass of iron deposited on the cathode, and (b) state whether the Fe²⁺ ions originally present are sufficient to account for the deposited iron.

Answer Options

A. 0.065 g of Fe; the Fe²⁺ ions are limiting (insufficient Fe²⁺ for deposition)
Correct Answer B. 0.130 g of Fe; the Fe²⁺ ions are in excess (current limits the deposition)
C. 0.130 g of Fe; the Fe²⁺ ions are limiting (insufficient Fe²⁺ for deposition)
D. 0.260 g of Fe; the Fe²⁺ ions are in excess (current limits the deposition)
Correct Answer
B
Correct Option:
0.130 g of Fe; the Fe²⁺ ions are in excess (current limits the deposition)

About This Question

This is Igcse Model Questions Vol1 2017 Chemistry Question 36. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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