Question

Complete the following reaction

$\mathrm{K}+{\mathrm{H}}_2\mathrm{O}\to$

Answer 1

• When potassium reacts with water it forms potassium hydroxide.
• This reaction is very vigorously and exothermic.
• This is a single replacement reaction where the potassium atom replaces the hydrogen from ${\mathrm{H}}_2\mathrm{O}$.

$2\mathrm{K}\left(\mathrm{s}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to \underset{\mathrm{Potassium}\mathrm{hydroxide}}{2\mathrm{KOH}\left(\mathrm{aq}\right)}+{\mathrm{H}}_2\left(\mathrm{g}\right)$