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Consider the reaction, Cr 2 O 7 2 - + 1 4 H + + 6 e - ⟶ 2 Cr 3 + + 7 H 2 O What is the quantity of electricity in coulombs needed to reduce 1 mole of Cr 2 O 7 2 - ? (Given: 1F ≈ 96500 C)

Options

  1. A5.79 x 10 5
  2. B5.69 x 10 5
  3. C5.59 x 10 5
  4. D5.49 x 10 5

Correct answer

A. 5.79 x 10 5

Step-by-step solution

1 mole Cr 2 O 7 2 - require 6 Faraday electricity (6 F) = 6 x 96500 C = 5.79 x 10 5 C

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