Balance the following chemical equations and identify the type of chemical reaction.
(a) Mg(s) + Cl2(g) → MgCl2(s)
(b) HgO(s) ⎯⎯⎯⎯ (Heat) → Hg(l) + O2(g)
(c) Na(s) + S(s) ⎯⎯⎯⎯ (Fuse) → Na2S(s)
(d) TiCl4 (l) + Mg(s) ⎯→ Ti(s) + MgCl2 (s)
(e) CaO(s) + SiO2(s) ⎯→ CaSiO3(s)
(f) H2O2 (l) ⎯⎯⎯⎯ UV → H2O(l) + O2 (g)
(a) Mg(s) + Cl2(g) → MgCl2(s)
This type of reaction is called a combination reaction or a synthesis reaction.
(b) 2HgO(s) ⎯⎯⎯⎯ (Heat) →2 Hg(l) + O2(g)
This is an example of thermal decomposition reaction.
(c) 2Na(s) + S(s) ⎯⎯⎯⎯ (Fuse) → Na2S(s)
This is an example of a Combination reaction.
(d) TiCl4 (l) + 2Mg(s) ⎯→ Ti(s) + 2MgCl2 (s)
This reaction falls under the category of Displacement reactions.
(e) CaO(s) + SiO2(s) ⎯→ CaSiO3(s)
This is a synthesis reaction.
(f) 2H2O2 (l) ⎯⎯⎯⎯ UV → 2H2O(l) + O2 (g)
This is a decomposition reaction.
Note:
A synthesis reaction is a chemical reaction in which multiple reactants combine to form a single product.
A decomposition reaction is a type of chemical reaction in which a single reactant breaks down into two or more elements or chemical compounds. If this decomposition is brought about by heat, then it is termed as thermal decomposition.
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound.