Question

______ React With Oxygen at Room Temperature To Form Their Basic Oxide

Answer 1

Basic oxides:-

• Basic oxides are generally formed when a metal reacts with oxygen at room temperature.
• The general reaction goes by:

$\mathrm{Metal}+\mathrm{Oxygen}\to \mathrm{Basic}\mathrm{oxide}$

• These basic oxide are alkaline in nature as they release hydroxide ions$\left({\mathrm{OH}}^{-}\right)$
• For example when Calcium reacts with Oxygen it forms a basic oxide of Calcium oxide$\left(\mathrm{CaO}\right)$:

$\underset{\mathrm{Calcium}}{2\mathrm{Ca}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{2{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Calcium}\mathrm{oxide}}{2\mathrm{CaO}\left(\mathrm{s}\right)}$

• On the further reaction of these basic oxides with water, a base is formed.
• When Calcium oxide reacts with water, a base of Calcium hydroxide $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$ is formed:

$\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Calcium}\mathrm{hydroxide}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{aq}\right)}$

Therefore, Metal react with oxygen at room temperature to form their basic oxide