Question

For an acid-base reaction, what is the reacting species in the following acid: Hydriodic acid? How do you determine this?

Answer 1

`HI` undergoes almost complete ionization in water. How do you determine this? By experiment.

Explanation:

Except for `HF`, ALL of the hydrogen halides in water are strongly acidic: `HI>HBr>HCl`. This difference in acidity is due to the weaker bond overlap of the higher halides, and also to the entropy effect of the smaller halide ions.