Question

The formula for hydrogen chloride is ______________ ( HCI / KCI ).

Answer 1

Formula

• Formula of Hydrogen Chloride ( HCl) is calculated by having a cross multiply of valencies of each other.
• Valency is actually the number of electrons gain or loose by an atom to achieve inert gas configuration.

Valency of Hydrogen

${\mathrm{H}}_1=\underset{\mathrm{K}\mathrm{shell}}{1}$

Valency = 1

Valency of Chlorine

${\mathrm{Cl}}_{17}=\underset{\mathrm{K}\mathrm{shell}}{2},\underset{\mathrm{L}\mathrm{shell}}{8},\underset{\mathrm{M}\mathrm{shell}}{7}$

Valency = 1

So, after having cross multiply of valencies of Hydrogen and Chlorine

Formula = HCl

Hence, The formula for hydrogen chloride is HCl ( HCI / KCI ) .