Why Does KMnO4 Oxidise I- to I2 in Acidic Medium but to IO3- in Alkaline Medium?

[jd12345]

Why in acidic medium KMnO₄ oxidises KI ( I-) to I₂ but in alkaline medium to IO₃ -

KMnO4 is a stronger oxidising agent in acidic medium right then why doesn't it oxidise I- to IO₃- in acidic medium too?

 

[Borek]

It may look off topic, but it contains a strong hint:

http://www.titrations.info/iodometric-titration

 

[jd12345]

It says in low pH iodine is oxidised by oxygen so it supports that IO3- should be formed in acidic medium
Probably i didn't get the hint

 

[Borek]

See the last reaction equation.

 

[jd12345]

Oh how did i miss that? Thanks