Question

Write the cell reaction that occurs when the folowing half cells are combined.
`I_(2)+2e^(-)rarr2I^(-)(1M), E^(@)=+0.54 V`
`Br_(2)+2e^(-)rarrBr^(-)(1M),e^(@)=+1.08 V`

Answer 1

`(i) Pb_(3)O_(4)` is a stoichiometric mixtrue of two oxides i.e 2 mole of PbO and 1 mole of `PbO_(2)` In phO, the oxidation state of Pb is + 2 while it is +4 in `PbO_(2)`.Both these oxides can react with HCI .Therefore, the reaction may be split in to.