Question

Write a balanced chemical equation for the given reaction and also classify them: Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

Answer 1

Balanced chemical equation:

• A balanced chemical equation is an equation where the number of atoms in the reactant and the product side should be an equal number.
• It can be balanced by using coefficients in front of reactant or product species..

Reaction:

• Hydrogen sulfide gas reacts with oxygen to form solid sulfur and water.

$2{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

• The above reaction is an example of a redox reaction because both the addition and removal of oxygen and hydrogen happen.

Redox reaction

• A redox reaction is a chemical process that involves the exchange of electrons between two reactants. This electron transfer can be identified by changes in the oxidation states of the reacting species.
• It is a combination of oxidation and reduction reactions.
• The addition of oxygen or loss of hydrogen is oxidation and removal of oxygen, or addition of hydrogen is reduction.