Question

अभिक्रिया `In^(2+)+Cu^(2+)toIn^(3+)+Cu` का `25^(@)C` पर समय स्थिरांक ज्ञात कीजिए ।
दिया है - `E_(Cu^(2+)//Cu)^(@)=0.15V,E_(In^(3+)//IN^(+))^(@)=-0.42V` एवं `E_(In^(2+)//In^(+))^(@)=-0.40V`

Answer 1

दिया है :
`Cu^(2+)+etoCu^(+)," "E_(1)^(@)=0.15V` . . . (i)
`In^(3+)+2etoIn^(+)," "E_(2)^(@)=-0.42V` . . . (ii)
`In^(2+)+etoIn^(+)," "E_(3)^(@)=-0.40V` . . . (iii)
समी (ii) व (iii) के द्वारा
`In^(3+)+etoIn^(2+)`
`1xxFxxE_(4)^(@)=E_(2)^(@)xx3F-E_(3)^(@)xx1xxF`
या `In^(3+)+etoIn^(2+)" "E_(4)^(@)=-0.44V`
सेल अभिक्रिया का `E_("cell")^(@)`
`E_(R.P._(Cu^(2+)//Cu))^(@)+E_(O.P._(In^(2+)//In^(3+)))^(@)`
`=0.44+0.15=0.59V`
`:." "E_("cell")^(@)=(0.059)/(2)"log"K_(c)`
`:." "0.59=(0.059)/(1)"log"K_(c)rArrK_(c)=10^(10)`