Question

Q2. (a)How many moles of electrons are required to :-
(i)reduce 1 mol of MnO 4 to Mn2+ (ii)produce 10.0 g of Al from molten Al2O3 ?
(b)How many moles of electrons are given by:- (1)8960 C (ii)a current of 1.5 A for 30 s
(c)How many minutes it would take to reduce 0.20 mol of Cu* to Cu using a current of 10 A.​

Answer 1

Answer:

Explanation:

mno4- to mn+2

oxidation number of mno4- is 5

so electrons are also 5

ii)10/27*3

1.12 e

iii)e-96500

xe-8960

x=0.093

iii)0.0005

c)0.2*2=10t/96500

t=64.33 min