1.2mole•20.17g/1mole= 24.20g
Answer:
Time take to deposit Ni is 259.02 sec.
Explanation:
Given:
Current
A
Faraday constant

Molar mass of Ni

Mass of Ni
g
First find the no. moles in Ni solution,
Moles of Ni 
mol
From the below reaction,
⇆ 
Above reaction shows "1 mol of
requires 2 mol of electron to form 1 mol of
"
So for finding charge flow in this reaction we write,

Charge flow
C
For finding time of reaction,

Where
charge flow


sec
Therefore, time take to deposit Ni is 259.02 sec.
Answer:
(A) 4×0.0001M
Explanation:
[OH-] = 10^-3.4 which is equivalent to 4×0.0001M
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All of these are correct except the first option, as Arrhenius bases increase the concentration of hydroxide ions.