K+H2=

The reaction between potassium (K) and hydrogen gas (H₂) typically results in the formation of potassium hydride (KH). The balanced chemical equation for this reaction is:

\[ 2 \, \text{K} + \text{H}_2 \rightarrow 2 \, \text{KH} \]

In this reaction, two moles of potassium react with one mole of hydrogen gas to produce two moles of potassium hydride. Potassium hydride is an ionic compound where potassium donates an electron to hydrogen, resulting in the formation of K⁺ and H⁻ ions.