Question

a mixture of aqueous solution of na2so4 and bacl2 forms white precipitate onixing. how many minimum number of separation are required to separate the precipitate from the mixture

Answer 1

Double decomposition takes place, and a white precipitate of barium sulphate will be formed.

BaCl2 + Na2SO4 = BaSO4 + 2NaCl

BaSO4 is insoluble in water. The soluble NaCl remains in solution.
By filtering it.