Question

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

(a) $\mathrm{Mg}\left(\mathrm{s}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)\to {\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

(b) $\mathrm{HgO}\left(\mathrm{s}\right)\to \mathrm{Hg}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

(c) $\mathrm{Na}\left(\mathrm{s}\right)+\mathrm{S}\left(\mathrm{s}\right)\to {\mathrm{Na}}_2\mathrm{S}\left(\mathrm{s}\right)$

(d) ${\mathrm{TiCl}}_4\left(\mathrm{l}\right)+\mathrm{Mg}\left(\mathrm{s}\right)\to \mathrm{Ti}\left(\mathrm{s}\right)+{\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

(e) $\mathrm{CaO}\left(\mathrm{s}\right)+{\mathrm{SiO}}_2\left(\mathrm{s}\right)\to {\mathrm{CaSiO}}_3\left(\mathrm{s}\right)$

(f) ${\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)\to {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Answer 1

Chemical reactions:

The chemical reactions are of five types: Combination reactions, Displacement reactions, Double displacement reactions, Decomposition reactions, Redox reactions.

Balanced reactions are given as:

(a) $\mathrm{Mg}\left(\mathrm{s}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)\to {\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

This reaction is the type of combination reaction.

(b)$2\mathrm{HgO}\left(\mathrm{s}\right)\to 2\mathrm{Hg}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

This reaction is a decomposition reaction.

(c)$2\mathrm{Na}\left(\mathrm{s}\right)+\mathrm{S}\left(\mathrm{s}\right)\to {\mathrm{Na}}_2\mathrm{S}\left(\mathrm{s}\right)$

This reaction is a combination reaction.

(d)${\mathrm{TiCl}}_4\left(\mathrm{l}\right)+2\mathrm{Mg}\left(\mathrm{s}\right)\to \mathrm{Ti}\left(\mathrm{s}\right)+2{\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

This reaction is a displacement reaction.

(e)$\mathrm{CaO}\left(\mathrm{s}\right)+{\mathrm{SiO}}_2\left(\mathrm{s}\right)\to {\mathrm{CaSiO}}_3\left(\mathrm{s}\right)$

This reaction is a combination reaction.

(f)$2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)\to 2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Type of reaction: Decomposition reaction