Advertisements
Advertisements
प्रश्न
Using the E° values of A and B, predict which is better for coating the surface of iron [E°(Fe+2/Fe) = -0.44V] to prevent corrosion and why?
Given: E° (A+2/A)=-2.37 V: E°(B+2/B)= -0.14V
Advertisements
उत्तर
Given:
E°(A+2 / A) = 2.37 V
E°(B+2 / B) = -0.14 V
`E_(cell)=E_(cell)^@ - (0.0591)/n log [Cr^(3+)]^2/[Fe^(2+)]^3`
(Nernst Equation)
`0.261 = E_(cell)^@ = 0.0591/6 log [0.001]^2/[0.001]^3`
`0.261 = E_(cell)^@ - (0.591 xx 2)/6`
`E_(cell)^@ = 0.2807V`
APPEARS IN
संबंधित प्रश्न
On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be
- 1
- 2
- 3
- 4
96500 coulombs correspond to the charge on how many electrons?
Write any four applications of electrochemical series
If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?
How much charge is required for the following reduction?
1 mol of \[\ce{MnO^-_4}\] to Mn2+.
What is the ratio of volumes of H2 and O2 liberated during electrolysis of acidified water?
(A) 1 : 2
(B) 2 : 1
(C) 1 : 8
(D) 8 : 1
State second law of electrolysis
Write the name of the cell which is generally used in transistors. Write the reactions taking place at the anode and the cathode of this cell.
When during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be ______.
The quantity of electricity needed to separately electrolyse 1 M solution of ZnSO4, AlCl3, and AgNO3 completely is in the ratio of ______.
