identify the type of chemical reaction in the following statement and define each of them
a)magnesium + hydrochloric acid - magnesium chloride + hydrogen
Answers
Answer :-
Word equation :-
Magnesium + Hydrochloric acid → Magnesium Chloride + Hydrogen
Chemical equation :-
Mg + HCl → MgCl₂ + H₂
Balanced chemical equation :-
Mg + 2HCl → MgCl₂ + H₂
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In this reaction, magnesium being more reactive than hydrogen, displaces it from 'HCl' and forms two new products i.e. Magnesium Chloride and Hydrogen gas.
So, it is a displacement reaction [single].
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Displacement reaction : This reaction occurs, when an element (more reactive) displaces another element (less reactive) from it's compound.
Some other examples :-
• Fe (s) + CuSO₄ (aq) → FeSO₄ (aq) + Cu (s)
• Pb (s) + CuCl₂ (aq) → PbCl₂ (aq) + Cu (s)
Required Answer :-
We know that
Magnesium is denoted by Mg
Hydrochloric acid is denoted by HCI
Magnesium chloride is denoted by MgCI₂
Hydrogen is denoted by H₂
Balanced equation will be :-
Mg + 2HCl ⇒ MgCl₂ + H₂
The reaction is a type of displacement reaction or replacement reaction.
As the word defines that there is a replacement between the elements in the reaction
Equation for displacement reaction
AB + C ⇒ A + BC