Using E˚ values to predict acid/basic solution

[kingy101]

Hi everyone,

Could someone please explain how E˚ values indicate that a reaction should occur in an acidic solution, as in this question?

Thanks!

[thushan]

The permanganate half equation uses H+ as a reactant.

[kingy101]

So when it references the E˚ values it's really just asking about the nature of the half equations?

[barydos]

maybe
permanganate is a strong oxidant
oxalate is strong reductant?
thus expected to spontaneously react?

[lzxnl]

H+ is necessary for the reaction to occur as given in the electrochemical series; that's the point of the H+