If the solution of K CrO4 (potassium chromate) is mixed with barium sulphate solution (BaSO4)
(a) What is the colour of the precipitate formed?
(b) Name the precipitate.
(c) What is the type of chemical reaction? Define it.
(d) Write the balanced chemical equation.
Answers
Answer:
The color of barium chromate precipitate is Yellow.
Explanation:
The reactants involved in this reaction are potassium chromate and barium sulfate.
The potassium chromate is yellow and is in powdered form.
Barium sulfate is white and when it is mixed in water, it gives a solution which is milky white.
The chemical equation involved in the given reaction is
As the potassium chromate salt is yellow, when it is added to the milky white solution of barium sulfate, a new compound called barium chromate which is yellow is precipitated.
Explanation:
a)The colour of the precipitate formed is yellow.
b)The precipitate is Barium Chromate.
c)The type of chemical reaction is Double Displacement and Precipitation.
Precipitation is the the reaction in which two soluble salt solutions react and undergo decomposition such that their radicals are exchanged and an insoluble salt called a precipitate is formed which settles down.
d)
K2CrO4 + BaSO4------------> K2SO4 + BaCrO4↓(precipitate)
This reaction serves as a test for chromate ions and dichromate ions in a basic medium(with NaOH or KOH).