Balanced and Unbalanced Equations

Write the balanced chemical equation with state symbols for the following reaction:
Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Write the balanced chemical equation with state symbols for the following reaction:
Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Balance the following equations:

(i) ${\mathrm{CH}}_{4\left(\mathrm{g}\right)} + {\mathrm{O}}_{2\left(\mathrm{g}\right)}\to {\mathrm{CO}}_{2\left(\mathrm{g}\right)} + {\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{g}\right)}$

(ii) ${\mathrm{Al}}_{\left(\mathrm{s}\right)} + {\mathrm{HCl}}_{\left(\mathrm{aq}\right)}\to {\mathrm{AlCl}}_{3\left(\mathrm{aq}\right)} + {{\mathrm{H}}_2}_{\left(\mathrm{g}\right)}$

Write the balanced equation for the following reaction :

$\mathrm{Zinc} {\mathrm{carbonate}}_{\left(\mathrm{s}\right)}\to \mathrm{Zinc} {\mathrm{oxide}}_{\left(\mathrm{s}\right)} + \mathrm{Carbon} {\mathrm{dioxide}}_{\left(\mathrm{g}\right)}$

A large piece of zinc metal is placed in copper $\left(\mathrm{II}\right)$ sulphate, ${\mathrm{CuSO}}_4$ solution. The blue solution becomes colourless as copper metal falls to the bottom of the container. The resulting solution contains zinc sulphate, ${\mathrm{ZnSO}}_4$. Write the balanced formula unit, and net ionic equations for the reaction.

${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\left(\mathrm{aq}\right)+6{\mathrm{O}}_2\left(\mathrm{g}\right)\to \mathcal{X}{\mathrm{CO}}_2\left(\mathrm{g}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\mathrm{Energy}$

The value of $\mathcal{X}$ in the balance chemical equation is:

Which of the following chemical equations is an unbalanced one?

Write the balanced equations for the following chemical reactions.

$\mathrm{Sodium} + \mathrm{water} \to \mathrm{sodium} \mathrm{hydroxide} + \mathrm{hydrogen}$

Write the balanced equations for the following chemical reactions.

$\mathrm{Barium} \mathrm{chloride} + \mathrm{aluminium} \mathrm{sulphate} \to \mathrm{barium} \mathrm{sulphate} + \mathrm{aluminium} \mathrm{chloride}$

Write the balanced equation for the following chemical reaction:

• $\mathrm{Hydrogen} + \mathrm{chlorine} \to \mathrm{hydrogen} \mathrm{chloride}$