Question

`2Ce^(4+)+Co to 2Ce^(3+)+Co^(2+),E_("cell")^(@)=1.89V`
यदि `E_(underset(1M)(Co^(2+))//Co)=-0.28V`0, तब `E_(underset(1M" "1M)(Ce^(4+))//Ce^(3+))` ज्ञात करो ।

Answer 1

किसी सेल के लिए
`E_("cell")^(@)=E_(O.P.)^(@)+E_(R.P.)^(@)`
चूँकि Co का ऑक्सीकरण हो रहा है अतः
`E_(O.P.)^(@)=0.28V`
`E_(R.P.)^(@)=E_(underset1M1M)(Ce^(4+)//Ce^(3+))=1.89-0.28=1.61V`
`(becauseE_("cell")^(@)=1.89V)`