H2o + k2o

The reaction between H2O (water) and K2O (potassium oxide) is a displacement reaction, where the potassium oxide displaces the hydrogen in water to form potassium hydroxide (KOH) and releases hydrogen gas (H2) as a byproduct.

The balanced chemical equation for this reaction is:

2K2O + 2H2O → 4KOH + H2

In this reaction, two molecules of potassium oxide react with two molecules of water to produce four molecules of potassium hydroxide and one molecule of hydrogen gas.