Balancing redox equations using 1/2 reaction method

[veganazi]

Homework Statement

Balance PbO2(s) + Cl(-) → PbCl2(s) + O2(g)

Homework Equations

n/a

The Attempt at a Solution

Pb(4+) + 2e(-) → Pb(2+) and I'm stuck because there's no 2nd reaction.

 

[Borek]

Yes there is - if you can't see it, assign oxidation numbers to all elements on both sides.

 

[veganazi]

Um 2H2O + 2Cl(-) → O2 + 4H(+) + 6e(-)? Is this right?

 

[Borek]

Um 2H2O + 2Cl(-) → O2 + 4H(+) + 6e(-)? Is this right?

No.

Have you tried to assign oxidation numbers? As long as you will ignore hints you will not move forward.