Question
Flow will you purify an impure sample of sodium chloride containing water soluble impurities?
Solution
A saturated solution of the impure sample is prepared and HCl gas is passed through it.
By passing HCl gas, the concentration of Cl– ion increases. According to Le-Chatelier’s principle, equilibrium shifts to the left. As a result, NaCl(s) will be formed. In other words, we can say that pure NaCl will get precipitated leaving behind the impurities in the aqueous solution.
By passing HCl gas, the concentration of Cl– ion increases. According to Le-Chatelier’s principle, equilibrium shifts to the left. As a result, NaCl(s) will be formed. In other words, we can say that pure NaCl will get precipitated leaving behind the impurities in the aqueous solution.
