38)
Rationalised 2023-24
54
Chemistry
2SO4
2– (aq) ® S2O8
2– (aq) + 2e–    
(
)
o
Ecell
 = 1 96 V
(2 39)
For dilute sulphuric acid, reaction (2 38) is preferred but at higher
concentrations of H2SO4, reaction (2