# The reaction between potassium and water

 Potassium + Water → Potassium hydroxide + Hydrogen 2K + 2H2O → 2KOH + H2

When the potassium is placed in water, it floats because it is less dense than the water. The hydrogen gas given off in the reaction pushes the potassium around on the surface of the water.

Potassium reacts violently with water. Enough heat is produced in the reaction to ignite the hydrogen gas given off. The hydrogen gas is contaminated with potassium which results in the lilac (bluish pink) flame.