Question

What is meant by :
i. Displacement reactions ii. Double displacement reactions
Give an example for each with a balanced equation.

Answer 1

Explanation:

1.single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.

2.Double displacement reactions may be defined as the chemical reactions in which one component each of both the reacting molecules is exchanged to form the products. During this reaction, the cations and anions of two different compounds switch places, forming two entirely different compounds.

Answer 2

Answer:

Displacement reactions occur when a metal from the electrochemical series is mixed with the ions of a metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal.

Zn+CuSO4→ZnSO4+Cu

A double displacement reaction is a type of reaction in which two reactants exchange ions to form two new compounds. Double displacement reactions typically result in the formation of a product that is a precipitate. Double displacement reactions take the form: AB + CD → AD + CB.

Na2S+2HCl→2NaCl+H2S