Question

Determine the equivalent weight of sodium chloride ($\mathrm{NaCl}$).

Answer 1

Equivalent weight: An equivalent weight of a solution is defined as the molecular weight of the solute divided by the valence of the solute.
Equivalent weight = molecular weight / x (Where, x represents the valency factor)

Part -1: To calculate the molecular weight :

The molecular weight of sodium chloride ($\mathrm{NaCl}$) is

$\mathrm{Na}$ = $1\mathrm{x}23=23$g

$\mathrm{Cl}$ =$1\mathrm{x}35.5$ g $=$ $35.5$ g

The molecular mass of $\mathrm{NaCl}$= mass of $\mathrm{Na}$ + mass of $\mathrm{Cl}$

$\mathrm{NaCl}$= $23+$$35.5$ $=$ $58.5$ g/mol

The valence of $\mathrm{NaCl}$ is 1.

Part -2: To calculate the equivalent weight:

According to the formula,

Equivalent Weight = Molecular weight/ Valency

= $58.5÷1$$=$ $58.5$ g/mol

Therefore, the equivalent weight of sodium chloride ($\mathrm{NaCl}$) is $58.5$ g/mol.