chem help

The reaction between sodium iodide and concentrated phosphoric acid produces hydrogen iodide but no iodine. The reaction of sodium iodide with concentrated sulphuric acid produces mainly iodine. The difference in product occurs because, in comparison with sulphuric acid, phosphoric acid is
A the weaker acid.
B the stronger oxidising agent.
C the weaker oxidising agent.
D the stronger reducing agent.(Total 1 mark)

Reply 1

Torigracex

17

I think it’s C, because iodine in NaI has an oxidation state of -1, in HI it’s still -1, but in I2 it’s 0, meaning sulfuric acid is the weaker oxidising agent as its unable to oxidise and increase the oxidation state of the iodine. Anyone else who reads this please correct me if I’m wrong x

Reply 2

-_Harry_-

9

Original post by Torigracex

I think it’s C, because iodine in NaI has an oxidation state of -1, in HI it’s still -1, but in I2 it’s 0, meaning sulfuric acid is the weaker oxidising agent as its unable to oxidise and increase the oxidation state of the iodine. Anyone else who reads this please correct me if I’m wrong x