Question

Take any one alkali metal and write its reaction with:

(a) Oxygen

(b) Water

(c)Acid

Answer 1

We are taking Sodium (alkali metal) for explaining these reactions-

(a) Reaction with oxygen:

• Sodium reacts with oxygen to form sodium oxides.
• The balanced chemical reaction can be written as:

$\underset{\mathrm{Sodium}}{4\mathrm{Na}}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2}\to \underset{\mathrm{Sodium}\mathrm{oxide}}{2{\mathrm{Na}}_2\mathrm{O}}$

(b) Reaction with water:

• Sodium reacts with water to form sodium hydroxide and hydrogen gas.
• The balanced chemical reaction can be written as:

$\underset{\mathrm{Sodium}}{2\mathrm{Na}}+\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}}\to \underset{\mathrm{Sodium}\mathrm{hydroxide}}{2\mathrm{NaOH}}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2}$

(c) Reaction with acid:

• Sodium reacts with an acid to form salt and hydrogen.
• The balanced chemical reaction can be written as:

$\underset{\mathrm{Sodium}}{2\mathrm{Na}}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{2\mathrm{HCl}}\to \underset{\mathrm{Sodium}\mathrm{chloride}}{2\mathrm{NaCl}}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2}$