OOOO
Chlorine preparation
Nelson's process diagram
Answers
Answer:
heya !! gud morngs!!
Explanation:
Nelson cell : It is an electrolytic cell , which is used commonly in electrolytic processes like production of sodium hydroxide from brine solution.
In the cell, there is a U shaped perforated steel tube, which has asbestos coating in its inner surface. In the cell, Carbon is taken as cathode and the upper roof of the cell acts as anode and the two electrodes are separated by the asbestus coating. Here, the brine (NaCl) solution acts as electrolyte.
=============================================================
★Chlorine gas is also produced in this process.
★Solid sodium hydroxide is obtained from this solution by the evaporation of water.
★Principle — In castner-kellner method NaOH is prepared by the electrolysis of aqueous solution of NaCl (Brine).
★Chlorine produced at the anode is removed from the top of the cell.
=====================================================
Preparation of chlorine by electrolytic method:
Chlorine is obtained as a byproduct during manufacture of NaOH. Aqueous NaCl solution is electrolysed. Hydrogen gas is obtained at cathode and chlorine gas is obtained at anode.
The reaction of chlorine with:
(i) cold and dil. NaOH
Sodium chloride and sodium hypochloride are formed. Cl2
+2NaOH→NaCl+NaOCl+H2O
(ii) slaked lime
Bleaching powder (CaOCl2 ) is obtained
Ca(OH)2 +Cl2 →CaOCl2 +H2 O
==========================================