Question

(a) What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride ?

(b) Write the balanced chemical equation for the reaction which takes place.

(c) State the physical conditions of reactants in which the reaction will not take place.

(d) Name the type of chemical reaction which occurs.

(e) Give one example of another reaction which is of the same type as the above reaction.

Answer 1

(a). When barium chloride$\left(BaC{l}_2\right)$ solution is added to sodium sulphate$\left(N{a}_{2}S{O}_4\right)$ solution, then a white precipitate of barium sulphate$\left(BaS{O}_4\right)$ is formed along with sodium chloride$\left(NaCl\right)$ solution.
(b). The balanced chemical reaction between sodium sulphate and barium chloride can be represented as:

(c). The above reaction does not take place when the reactants are in a solid-state because in solid-state the exchange of ions does not take place.
(d). The above reaction is a double displacement reaction. Double displacement reactions are those reactions in which the exchange of ions takes place between two reactants.
(e). Double displacement reaction between silver nitrate$\left(AgN{O}_3\right)$ solution and sodium chloride$\left(NaCl\right)$ solution forms a white precipitate of silver chloride$\left(AgCl\right)$ and sodium nitrate$\left(NaN{O}_3\right)$ solution.

$AgN{O}_3\left(aq\right)+NaCl\left(aq\right)⟶AgCl\left(s\right)+NaN{O}_3\left(aq\right)$