What is the difference between displacement and double displacement reactions? Write equations for these reactions.
Answer
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Hint:In displacement reaction, one element is substituted for another element. In a double displacement reaction, two ionic compounds are exchanged.
Complete step by step answer:
Note: The possibility to make a mistake is that in displacement reactions, more active metal displaces less reactive metal whereas in double displacement reaction, the ions are exchanged between the reactants.
Complete step by step answer:
| DISPLACEMENT REACTION | DOUBLE DISPLACEMENT REACTION |
| 1) It is defined as the reaction in which one component displaces another component from its compound is called displacement reaction. | 1) The reaction in which two different atoms or groups of atoms (ions) are displaced by other atoms or groups of atoms (ions) is known as a double displacement reaction. |
| 2) The following reaction showing displacement reaction is given below:${ 2HCl(aq)+Zn(s)\rightarrow ZnCl }_{ 2 }{ (aq)+H }_{ 2 }{ (g) }$This is an example of a single displacement reaction. The hydrogen ions in HCl are replaced by zinc atoms and in this process, new element hydrogen is formed. | 2) The following reaction showing a double displacement reaction is given below:${ Na }_{ 2 }{ SO }_{ 4 }{ (aq)+BaCl }_{ 2 }{ (aq)\rightarrow BaSO }_{ 4 }{ (s)+2NaCl(aq) }$In this reaction, sulfate ions displace chloride ions and vice versa, or both the ions exchange each other. These reactions occur in ionic compounds. ${ CuCl }_{ 2 }{ (aq)+2AgNO }_{ 3 }{ (aq)\rightarrow Cu(NO }_{ 3 }{ ) }_{ 2 }{ (aq)+2AgCl(s) }$There are two ways of considering a double-displacement reaction, either anion is swapped or cations are swapped. |
| 3) It is a slow reaction. | 3) It is a fast reaction. |
| 4) In this reaction, a change of color takes place. | 4) In this reaction, precipitate formation takes place. |
Note: The possibility to make a mistake is that in displacement reactions, more active metal displaces less reactive metal whereas in double displacement reaction, the ions are exchanged between the reactants.
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