Why dilute hcl cannot be concentrated beyond 22.2 percent on boiling?
Answers
1.A dilute aqueous solution of hydrochloric acid gets gradually concentrated during distillation and reach its concentration of acid reaches 22.2% HCl by weight which boils at 110celsius.
2.After that no further increase in the concentration of acid because vapour evolved before 110 celsius are vapour of water but the temperature above 110 celsius vapour mostly of HCl
3.At this concentration water and HCl vapourise in the same proporation of weigh.
Explanation:
1.If you boil 20% HCl, it boils off with the water as an azeotrope. Past that 20% threshold, heating the acid will release HCl gas. You could concentrate it by heating it and leading the gas into chilled wate
2.The inhalation of a large quantity of hydrochloric acid will cause intoxication and result in death. When hydrochloric acid is heated, it generates a large quantity of hydrochloric acid fumes.
Answer: Dilute Hydrochloric acid cannot be concentrated beyond 22.2 percent on boiling as the molecules of HCl will be mixed with the water vapor.
Explanation:
Concentrated HCl is a composition of HCl gas in water.
When the concentration of concentrated HCl becomes 22.2 percent by weight, it forms a constant boiling mixture.
At this concentration of HCl gas in water if the solution is still heated, then water and HCl both vaporize in the same proportion by weight.
When this concentration is reached, no further increase in concentration is possible by boiling.
Hence, dilute HCl can not be concentrated beyond 22.2 percent on boiling.