Balance the following equations by ion electron (half reaction) method for each of the following equations:
a. `Cr_(2)O_(7)^(2-) + Fe^(2+) rarr cr^(3+) + Fe^(3+) + H_(2)O`
b. `H_(2)O_(2) + I^(Ө) + H^(o+) rarr H_(2)O + _(2)`
c. `AsO_(3)^(3-) + H^(o+)+IO_(3)^(Ө) rarrAsO_(4)^(3-)+I^(Ө)` (in acid medium)
d. `Cr_(2)O_(7)^(2-) + H^(o+)+Cl^(Ө) rarr3Cr^(3+) + Cl_(2)+H_(2)O`
e. `MnO_(4)^(Ө)+Fe^(2+) rarr Mn^(2+)+Fe^(3+)` (in alkaline medium)

Answer

A

Explanation

a. `Cr_(2)O_(7)^(2-)+14H^(o+)+6Fe^(+2)rarr2Cr^(3)+6Fe^(3+)+7H_(2)O`
b. `H_(2)O_(2)+2H^(o+)+2I^(ө)rarr2H_(2)O+I_(2)`
c. `IO_(3)^(ө)+3AsO_(3)^(3-)rarr3AsO_(4)^(3-)+I^(ө)`
d. `Cr_(2)O_(7)^(2-)+14H^(o+)+6Cl^(ө)rarr2Cr^(3+)+7H_(2)O+3Cl_(2)`
e. `MnO_(4)^(ө)+4H_(2)O+5Fe^(2)+rarrMn^(2)+5Fe^(3+)+8overset(ө)OH`