Q) Very long answer :
(i) Differentiate between precipitation and double displacement reactions.
(ii) Compare between double displacement reactions and displacement reactions also between decomposition and combination reactions.
Thank you !
(i) Precipitation reaction-
Those reactions in which one component neutralize the other component due to which salt is formed which get precipitate. Such reactions are called a precipitation reactions. For example:
Ca(OH)2 + HCl → CaCl2 + 2H2O
Double displacement reaction-
A Double Displacement Reaction is a bimolecular process in which parts of two compounds are exchanged to give two new compounds. The general equation used to represent double displacement reactions can be written as:
AB + CD → AD + BC
An example of the double displacement reaction is as follows
Pb(NO3)2 + 2KI ----> PbI2 + 2KNO3
Thus, double Displacement Reactions have two common features:
- Firstly, two compounds exchange their ions resulting in the formation of new compounds.
- Secondly, one of the new products formed would be separated from the mixture in some way (commonly as a solid or gas).
Displacement reactions are those in which an uncombined single element simply replaces the other in a compound. A general chemical equation for the reaction is
AB + X -------> AX + B
For example-
Zn + CuSO4 -----> ZnSO4 + Cu
Double displacement reaction-
A Double Displacement Reaction is a bimolecular process in which parts of two compounds are exchanged to give two new compounds. The general equation used to represent double displacement reactions can be written as:
AB + CD → AD + BC
An example of the double displacement reaction is as follows
Pb(NO3)2 + 2KI ----> PbI2 + 2KNO3
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