Chemical Reactions and Equations | Activity 1.10 with Solution

Activity 1.10

• Take about 3 mL of sodium sulphate solution in a test tube.
• In another test tube, take about 3 mL of barium chloride solution.
• Mix the two solutions (Fig. 1.9).
• What do you observe?

Answer:

A white substance (BaSO₄) is formed by the reaction of SO₄^2– and Ba²⁺. This water insoluble substance is called precipitate. Any reaction that produces a precipitate is called precipitation reaction.

The other product (sodium chloride) remains in solution.