Question

Write the chemical name for the ionic compound and mention the molecular weight.

${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$

Answer 1

Ionic Compound

• The ionic compounds contain ions and are held together by the attractive forces among the oppositely charged ions.
• In this compound, ions are held together by an ionic bond
• In these compounds, one ion gains an electron(anion) and another one gives the electron(cation).

${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$

• The chemical name of ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$ is Aluminium sulphate (IUPAC name).
• It is formed by the reaction of aluminum hydroxide with sulphuric acid.

Molecular weight:

• Mass of Al - 27
• Mass of S - 32
• Mass of O -16
• Mass of ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$ = (2 x 27) + (3 x 32) + (12 x 16) = 342 g