Take about 3 ml of sodium sulfate solution in a test tube.
In another test tube, take about 3 ml of barium chloride solution.
Mix the two solutions
What do you observe?
a white substance, which is insoluble in water, is formed.
The white precipitate of BaSO4 is formed by the reaction of SO4²- and Ba2+.
Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq)
IMPORTANT QUESTIONS AND ANSWERS:
displacement and double displacement 1. Distinguish between a displacement reaction and a double displacement reaction. Identify the displacement and the double displacement reaction from the following reactions. Answer.
A displacement reaction is a reaction in which more reactive metal can displace less reactive metal from its salt solution.
Double displacement reaction are those reactions in which compounds exchange their ions to form two new compounds
(i) Double displacement reaction, (ii) Displacement reaction.
2.Express the following facts in the form of a balanced chemical equation : “When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed”.
ANS:The silver nitrate reacts with copper to form hair like crystals of silver metal and a blue solution of copper nitrate: