Write the half equations for each of the following redox reactions:
`(i) 2Fe^(3)+(aq)+2I(aq)rarrI_(2)(s)+2Fe^(2)+(aq)`
`(ii) 2Na(s)+CI_(2)(g)rarr2NaCI(s)`
`(iii)Mg(s)+CI_(g)rarrMgCI_(2)(s)`
`(iv) Zn(s) + 2H^(+)(aq)rarrZn^(2)+(aq)+H_(2)(g)`
`(V) 2k(s)+CI_(2)(g)rarr2kCI(s)`

Explanation

`(i)2I(-)(aq)+2e^(-)rarrI_(2)(s)+2e^(-)` (oxiodation half reaction)
`2Fe^(3) + (aq)+ 2e^(-)rarr2Fe^(2)+(aq)`(reduction half reaction)
`(ii) 2Na(s)rarr2Na^(+)(aq)+2e^(-)`(oxidation half reaction)
`CI_(2)(g) + 2e^(-)rarr2CI^(-)(aq)`(reduction half reaction)
`(iii) Mg(s)rarrMg^(2+)(aq)+2e^(-)`(oxidation half reaction)
`CI_(2)(g)+2e(-)rarr2CI^(-)(aq)`(reduction half reaction)
`(iv) Zn(s)rarrZn^(2+)(aq)+2e^(-)`oxidation half reaction
`2H^(+)(aq)+2e^(-)rarrH_(2)(g)`reduction half reaction
`(v) K(s) rarrK^(+)(g)+e^(-)` oxidation half reaction
`CI_(2)(g)+2E^(-)rarr2CI^(-)(g)` redcution half reaction