Question

State what would you observe when: Barium chloride solution is slowly added to sodium sulphate solution.

Answer 1

Solution:

• Reactants: Barium chloride (BaCl₂) and Sodium sulphate (Na₂SO₄)
• When BaCl₂ solution is slowly added to Na₂SO₄ solution, a white precipitate of barium sulphate (BaSO₄) and soluble sodium chloride (NaCl) is produced.
• Thus, the reaction is categorized as a precipitation reaction
• The balanced chemical equation is:
• ${\mathrm{BaCl}}_2\left(\mathrm{aq}\right)+{\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{BaSO}}_4\left(\mathrm{s}\right)+\mathrm{NaCl}\left(\mathrm{aq}\right)$

Observation: A white precipitate of BaSO₄ is observed.