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Find the charge required to flow through an electrolyte to liberate one atom of (a) a monovalent material and (b) a divalent material.

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(a) 1eq. mass of the substance requires 96500 coulombs

Since the element is monoatomic, thus eq. mass = mol. Mass

6.023 × 1023 atoms require 96500C

1 atoms require (96500/6.023) x 1023C = 1.6 x 10-19C

(b) Since the element is diatomic eq.mass = (1/2) mol.mass

∴ (1/2) × 6.023 × 1023 atoms 2eq. 96500 C

=> 1 atom require = (96500 x 2)/6.023 x 1023 = 3.2 x 10-19C

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