Does zinc react in distilled water?

Jun 11, 2017

see below

Explanation:

thermodynamically zinc should react with distilled water because its redox potential is -0,76 V while for neutral water is -0,42 V, so we should have:
$Z n + 2 {H}^{+} = Z {n}^{2 +} + {H}_{2}$. But cinetically this reaction doesn't occur (it need an high activation energy to develop a gas on its surface) unless there is an opportune catalyst.
So Zn is used to preserve iron from corrosion by covering the same iron with thin layers of zinc