The molten metal spreads over the water and exposes a larger surface to water. Also, the hydrated radius of lithium is the greatest out of all alkali metals. This reduces the ionic mobility which in turn reduces the speed of the molten metal. That’s why potassium gives a more violent reaction with water. Why does potassium rise in renal failure? how to flush excess potassium.

Why does potassium react with water?

Potassium compounds, when dissolved in water, form Potassium ions, positively changed Potassium atoms, vital to our bodies functions. Potassium metal reacts violently with water (A compound of Hydrogen and oxygen) to release Hydrogen gas, leaving another compound behind, Potassium Hydroxide.

Why does potassium react more violently with water than sodium?

As potassium is larger than sodium, potassium’s valence electron is at a greater distance from the attractive nucleus and is so removed more easily than sodium’s valence electron. As it is removed more easily, it requires less energy, and can be said to be more reactive.