TEACHING LABORATORY
Chemical Reactions
VIRTUAL CHEMLAB
PERFORMANCE LABORATORY
The Laboratory
Challenge
The MCQ Challenge
ChemQuest
  VIRTUAL CHEMLAB
 


Gas Lab Manual

2. Confirmatory Tests for Gases

c) Test for Chlorine Gas

TEST
Chlorine gas, Cl2

1a) Place 1 cm3 of bleach solution or sodium chlorate(I) in a test tube. Add an equal volume of dilute hydrochloric acid.

b) Hold a piece of moist blue litmus paper over the mouth of the test tube.
Observations Effervescence occurs.
Pungent gas evolved turned moist blue litmus red and bleaches it.
Type of Chemical reaction involved to test for gas. Chlorine gas dissolves in water to form a strong acid and a bleaching agent.
Hydrochloric acid dissociates to form hydrogen ions ions, which turn blue litmus red.
Chemical equation Cl2 (g) + H2O (l)   ----->     HCl (aq) + HClO (aq)
                                                           bleaching agent

 

Prev     1     2     3     4     5     6     7     8     9     Next
 

Copyright © 2001 Crescent Girls' School, ASKnLearn.com Pte Ltd.

All rights reserved.