Question

Classify each of the following chemical reactions as a synthesis decomposition and single displacement or double displacement reaction

Answer 1

1. Synthesis reaction : there is only 1 product formed from 2 or more reactant

E.g:

`H_2(g)+N_2(g)\text{ }\Rightarrow2NH_3(g)\text{ }`

2. Decomposition : reaction that occurs in presence of UV light and only 1 reactant that decomposes into 2 or more products.

E.g:

`CH_3Br(g)+UV_(light)\Rightarrow CH_3(g)\text{ + Br (g)}`

3. Single displacement : reaction that occurs when 1 reactant displaces other reactant from its compound:

E.g:

`Zn(s)+CoCl_2(aq)\text{ }\Rightarrow ZnCl_2(aq)\text{ + Co(s)}`

4. Double displacement : reaction that occurs when both reactant displaces each other.

E.g :

`K_2S(aq)+Co(NO_3)_2\Rightarrow2KNO_3(aq)\text{ + }CoS(s)\text{ }`