CBSE Class 9 Answered
How is the precipitation reaction used to verify law of conservation of mass and why it can't be displacement reaction?
Asked by Ashok Maheshwari | 07 Feb, 2014, 05:37: PM
Expert Answer
Aqueous solution of barium chloride reacts with sodium sulphate to form a white precipitate of barium sulphate and an aqueous solution of sodium chloride.
This is an example of a chemical reaction because a precipitate has formed, there is a change in colour, and the products are not easily converted back into its reactants.
During this reaction displacement of ions also occurs. But formation of precipitate shows that there is a chemical reaction happening inside the flask which is one of the important criteria of the experiment.
Answered by | 10 Feb, 2014, 04:28: PM
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