Question

Complete the following flow chart. Also balance it.

$\mathrm{K}+{\mathrm{O}}_2\to \underset{\mathrm{Potassium}\mathrm{oxide}}{\mathrm{\_\_\_\_\_\_}}+{\mathrm{H}}_2\mathrm{O}\to \underset{\mathrm{Caustic}\mathrm{potash}}{\mathrm{\_\_\_\_\_\_}}$

Answer 1

Part 1-

When Potassium reacts with Oxygen we get Potassium oxide and water.

Hence, the equation will be-

$\underset{\mathrm{Potassium}}{2\mathrm{K}}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2}\to \underset{\mathrm{Potassium}\mathrm{oxide}}{{\mathrm{K}}_2\mathrm{O}}$

Part 2-

When Potassium oxide is further reacted with water we get Caustic potash also known as Potassium hydroxide.

${\mathrm{K}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{KOH}$

Thus, the complete equation of both parts will be.

$\underset{\mathrm{Potassium}}{\mathrm{K}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Potassium}\mathrm{oxide}}{{\mathrm{K}}_2\mathrm{O}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Caustic}\mathrm{potash}}{\mathrm{KOH}\left(\mathrm{s}\right)}$