Question

Complete the following reactions:

(1)$H_2\left(g\right)+M_m{O}_o\left(s\right)\to$

(2) $CO\left(g\right)+H_2\left(g\right)\to$

(3) $C_3{H}_8\left(g\right)+3H_{2}O\left(g\right)\to$

(4) $Zn\left(s\right)+NaOH\left(aq\right)\to$

Answer 1

Understanding the reactions:

Reaction of metal oxide and hydrogen gas:

• Metal oxide has a high tendency to react with water and gets reduced into metal and hydrogen is oxidized to water.
• $\underset{\mathrm{Hydrogen}}{{\mathrm{oH}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Metal}\mathrm{Oxide}}{{\mathrm{M}}_{\mathrm{m}}{\mathrm{O}}_{\mathrm{o}}(\mathrm{s}})\to \underset{\mathrm{Metal}}{\mathrm{mM}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{oH}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Reaction of carbon monoxide with hydrogen gas:

• The mixture of carbon monoxide and hydrogen gas is called syn gas or synthesis gas, as it is used to synthesize many hydrocarbons.
• Carbon monoxide reacts with hydrogen to form methanol.
• $\underset{\mathrm{Carbon}\mathrm{monoxide}}{\mathrm{CO}\left(\mathrm{g}\right)}+\underset{\mathrm{Hydrogen}}{2{\mathrm{H}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Methanol}}{{\mathrm{CH}}_3\mathrm{OH}\left(\mathrm{l}\right)}$

Reaction of Propane with water:

• Propane reacts with water in the presence of an acid such as sulfuric acid to form carbon monoxide and hydrogen gas is released as a by-product.
• $\underset{\mathrm{Propane}}{{\mathrm{C}}_3{\mathrm{H}}_8\left(\mathrm{g}\right)}+\underset{\mathrm{Water}}{3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)}\to \underset{\mathrm{Carbon}\mathrm{monoxide}}{3\mathrm{CO}}+\underset{\mathrm{Hydrogen}}{7{\mathrm{H}}_2(\mathrm{g}})$

Reaction of Zinc with Sodium Hydroxide:

• Zinc metal reacts with Sodium Hydroxide solution to form Sodium Zincate and Hydrogen gas is released as a byproduct.
• $\underset{\mathrm{Zinc}}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\mathrm{Sodium}\mathrm{hydroxide}}{\mathrm{NaOH}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{zincate}}{{\mathrm{Na}}_2{\mathrm{ZnO}}_2}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2}$