Question

Write the chemical equation for the following reactions:

• Reaction of lead acetate with hydrogen sulphide

Answer 1

Chemical equation: Chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae.

Reaction:

• Lead acetate is a colourless solution.
• When it reacts with hydrogen sulphide, the black colour of lead sulphide precipitates.
• The balanced chemical reaction can be represented as:

$\underset{\mathrm{Lead}\mathrm{acetate}}{{\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2\mathrm{Pb}}+\underset{\mathrm{Hydrogen}\mathrm{sulphide}}{{\mathrm{H}}_2\mathrm{S}}\to \underset{\mathrm{Lead}\mathrm{sulphide}}{\mathrm{PbS}\downarrow }+\underset{\mathrm{Acetic}\mathrm{acid}}{2{\mathrm{CH}}_3\mathrm{COOH}}$

It is a precipitation reaction-

• It is a reaction in which two compounds in their aqueous state react to form one insoluble salt as a product.