1.

Standard electrode potentials are given as under : Ti^(4+)+e^(-)toTi^(3+)E^(@)=+0.01V Fe^(3+)+e^(-)toFe^(2+)E^(@)=+0.77V Tell whether Ti^(4+) ion may be used to oxidies F^(II) to Fe^(III) .

Answer»

Solution :The GIVEN reaction is :
`FE^(2+)+Ti^(4+)toFe^(3+)+Ti^(3+)`
The electrochemical cell based UPON above redox reaction is :
`underset("Anode")Fe^(2+)|Fe^(3+)||underset("Cathode")Ti^(4+)|Ti^(3+)`
`E_("cell")^(@)=E_("cathode")^(@)-E_("anode")^(@)`
`=0.01-0.77`
`=-0.76V`
Since `E^(@)` cell is negative, `:.Ti^(4+)` cannot be used to oxidise `Fe^(2+)` to `Fe^(3+)`.


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