Science
Answer
A chemical reaction in which two compounds in their aqueous state react to form an insoluble substance (precipitate) as one of the products is called a precipitation reaction.
Some examples of precipitation reactions are:
Take a solution of silver nitrate in a test tube and add dil. hydrochloric acid. A curdy white ppt. of AgCl is formed.
AgNO3 (aq) + HCl (l) ⟶ AgCl (s) ↓ + HNO3 (g)When sodium sulphate reacts with barium chloride, a white ppt. of barium sulphate appears.
Na2SO4 (aq) + BaCl2 (aq) ⟶ BaSO4 (s) ↓ + 2NaCl (aq)
Related Questions
What is the difference between displacement and double displacement reactions? Write equations for these reactions?
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved?
Explain the following in terms of gain or loss of oxygen with two examples each.
(a) Oxidation
(b) Reduction
A shiny brown coloured element 'X' on heating in air becomes black in colour. Name the element 'X' and the black coloured compound formed.