Use the half-equations written earlier and combine them to form the overall equation for.
1. CI2 to CI
with
Br to Br2
2. Pb2+ to Pb
with
Al to A13+
3. H2SO4 to HS
with
I- to I2
4. HNO3 to NO
with
Fe to Fe2+
5. H2SO4 to SO2
with
Br- to Br2

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

‘which reaction would most likely require the use of an inert electrode?