Chapter 1: Chemical reactions and equations

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Q
Chemical reactions and equations

Question:

What is the difference between displacement and double displacement reactions? Write equations for these reactions

Answer:

Displacement reaction: Displacement reaction is the type of reaction in which the reactive metal displaces less reactive metal in the solution. For example, the aluminium is a reactive metal and it displaces iron from the solution to form aluminium oxide.

Fe2O3 (s) + 2Al (s) → Al2O3 (s) + 2Fe (s)

 

Double displacement reaction: Double displacement reaction is defined as the chemical reactions in which two reactants exchange ions to form two new compounds. For example, the potassium bromide exchange with barium iodide ion to form potassium iodide along with barium bromide.

2KBr (aq) + BaI2 (aq) → 2KI (aq) + BaBr2 (s)


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