Reaction Between Sodium Sulphate and Barium Chloride Solution (Chemical Reactions) Video Lecture | Science Class 9

Reaction between Sodium Sulphate and Barium
Chloride Solution
Chemical reactions are part of our day life.
From photosynthesis occurring in plants, to
cooking of food in the kitchen, there are
different sets of chemical reactions happening
around us.
A chemical reaction happens when two or more
elements interact together to form a chemical
bond between atoms and form a chemical compound.
Chemists have classified the chemical reactions
into four different types depending upon the
type of chemical change occurring in the reaction.
Combination or synthesis reactions are those
in which two or more chemical elements or
compounds unite to form a more complex product.
Decomposition reactions are those in which
a compound is decomposed into smaller compounds
or elements.
Single displacement reactions are characterized
by an element being displaced by a more reactive
element whereas double displacement reactions
represent those reactions in which two compounds
exchange ions or bonds to form different compounds.
The aim of this experiment is to study the
reaction between sodium sulphate and barium
chloride solutions and classify it as combination
reaction, decomposition reaction, displacement
reaction or double displacement reaction.
Materials required:
Boiling tubes, solution of sodium sulphate
and Solution of barium chloride.
Procedure:
Take a small quantity of sodium sulphate solution
in a boiling tube.
Then take a small quantity of barium chloride
solution in another boiling tube.
Pour the barium chloride solution taken in
the boiling tube into the boiling tube containing
sodium sulphate solution.
On adding, a white precipitate of barium sulphate
is formed in the boiling tube.
This confirms the presence of sulphate the
solution.
Now keep the content of the boiling tube undisturbed
for 10 minutes.
After 10 minutes, we can see that the white
precipitate in the test tube settles to the
bottom of the test tube.
Now decant the upper solution in the boiling
tube into the beaker.
Add a few drops of dilute HCL to the white
precipitate of barium sulphate and shake the
test tube well.
We can observe that white precipitate remain
insoluble in the dilute HCL
Here a chemical reaction occurs between sodium
sulphate and barium chloride to form barium
sulphate and sodium chloride.
This is a double displacement reaction in
which sulphate ions are displaced by chloride
ions and chloride ions are displaced by sulphate
ions.