STANDARD Chemistry Faraday's Laws MCQ Question
How many coulombs of electricity is required to reduce 1 mole of Cr₂O₇²⁻ in acidic medium?
4 × 96500 C
6 × 96500 C
2 × 96500 C
1 × 96500 C
Correct Answer
Detailed Explanation
In acidic medium, Cr₂O₇²⁻ + 14 H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O. 1 mole of Cr₂O₇²⁻ requires 6 moles of electrons or 6 × 96500 C of electricity.
Found an issue with this question?
Related Questions
More from Electrochemistry
Calculate the emf of the cell in which of the following reaction takes place Ni(s) + 2Ag⁺(0.002M) ⟶ Ni²⁺(0.160M) + 2Ag(s) Given that E°cell = 1.05V
The molar conductance of NaCl, HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm² mol⁻¹ respectively. The molar conductance of CH...
The molar conductivity of 0.007 M acetic acid is 20 S cm² mol⁻¹. What is the dissociation constant of acetic acid? Choose the correct option. [Λ°_H⁺ =...