wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Calculate the equilibrium constant for the redox reaction at 25oC, Sr(s)+Mg2+(aq)Sr2+(aq)+Mg(s), that occurs in a galvanic cell. EoMg2+/Mg=2.37V and EoSr2+/Sr=2.89V.

A
2.69×1015
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2.69×1017
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
3.69×1017
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
3.69×1015
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 3.69×1017
(i) Mg2+(aq)+2eMg(s);EoMg2+/Mg=2.37V
Sr2+(aq)+2eSr(s);EoSr2+/Sr=2.89V
(ii) Sr(s)Sr2+(aq)+2e;EoSr/Sr2+=2.89V

Adding (i) & (ii), we get,
Sr(s)+Mg2+(aq)Sr2+(aq)+Mg(s);Eo=2.37+2.89=0.52V
Now, ΔGo=RTlnKeq
nFEo=RTlnKeq
lnKeq=nFEoRT=2×96500×0.528.314×298
lnKeq=40.507
Keq=3.69×1017

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Types of Redox Reactions
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon