Question

The time required to produce 0.2 mol of H2(g) using acurrent of 2 ampere by the electrolysis of aqueous sodiumchloride is424.51 minutes385.28 minutes321.66 minutes495.97 minutes​

Answer 1

Explanation:

chemical reaction of producing H2 (g) is given as, 2H+ + 2e-eH2 (g)

here To produce one mole of H2 gas, two moles of electrons is required.

so, for 0.2 mole of H2 gas, 0.4 mole of

electrons will be required.

now charges of 0.4 moles of electrons= 0.4 x 6.023 x 10²³ x 1.6 × 100-19 C =3.85472 × 10⁴C

now using formula,

current = charge / time

2 A= 3.85472 x 10⁴C/time

time = 3.85472/2 x 10⁴ sec

=19273.6/60 minutes

=321.27 minutes