Question

What is Nernst equation of the given ? and
(( wus iigw tjm )) write the Nernst equation for the reaction. 2Cr(s) + 3Cd2+ (aq) → 2Cr3+ (aq) + 3Cd (s)​

Answer 1

Answer:

(i) E

cell

o

=E

cathode

0

−E

anode

0

=−0.40−(−0.74)=0.34 V

ΔG

0

=−nFE

cell

o

=−6×96500×0.34=196860J/mol=196.86kJ/mol

log K

c

=

0.059

nE

cell

o

=

0.059

6×0.34

=34.576

K

c

=3.76×10

34

(ii) E

cell

o

=E

cathode

0

−E

anode

0

=0.80−(−0.77)=0.03 V

ΔG

0

=−nFE

cell

o

=−1×96500×0.03=2895J/mol=2.895kJ/mol

log K

c

=

0.059

nE

cell

o

=

0.059

1×0.03

=0.508

K

c

=3.22