Question

Balance the following chemical equations and identify the type of chemical reaction.

(a) $\text{HgO(s)}\stackrel{\text{Heat}}{\to }\text{Hg(l)}+{\text{O}}_2\text{(g)}$
(b) $\text{Na(s)}+\text{S(s)}\stackrel{\text{Fuse}}{\to }{\text{Na}}_2\text{S(s)}$
(c) ${\text{TiCl}}_4\text{(l)}+\text{Mg(s)}\to \text{Ti(s)}+{\text{MgCl}}_2\text{(s)}$
(d) $\text{CaO(s)}+{\text{SiO}}_2\text{(s)}\to {\text{CaSiO}}_3\text{(s)}$
(e) ${\text{H}}_2{\text{O}}_2\text{(l)}\stackrel{\text{UV}}{\to }{\text{H}}_2\text{O(l)}+{\text{O}}_2\text{(g)}$

Answer 1

(a) $2\text{HgO(s)}\stackrel{\text{Heat}}{\to }2\text{Hg(l)}+{\text{O}}_2\text{(g)}$; Decomposition reaction

(b) $2\text{Na(s)}+\text{S(s)}\stackrel{\text{Fuse}}{\to }{\text{Na}}_2\text{S(s)}$; Combination reaction

(c) ${\text{TiCl}}_4\text{(l)}+2\text{Mg(s)}\to \text{Ti(s)}+2{\text{MgCl}}_2\text{(s)}$; Displacement reaction

(d) $\text{CaO(s)}+{\text{SiO}}_2\text{(s)}\to {\text{CaSiO}}_3\text{(s)}$ Already balanced; Combination reaction

(e) ${\text{2H}}_2{\text{O}}_2\text{(l)}\stackrel{\text{UV}}{\to }2{\text{H}}_2\text{O(l)}+{\text{O}}_2\text{(g)}$; Decomposition reaction