Question

Write chemical equation for the chemical reaction which occurs when the aqueous solutions of barium chloride and sodium sulphate react together. Write the symbols of the ions present in the compound precipitated in the reaction.

Answer 1

When aqueous solutions of barium chloride (BaCl$_2$) and sodium sulfate (Na$_2$SO$_4$) are mixed, a double displacement reaction occurs, resulting in the formation of a white precipitate of barium sulfate (BaSO$_4$) and aqueous sodium chloride (NaCl).
Chemical equation:
\[\text{BaCl}_2\text{(aq)} + \text{Na}_2\text{SO}_4\text{(aq)} \rightarrow \text{BaSO}_4\text{(s)} + 2\text{NaCl(aq)}\]
Ions in the precipitate: Ba$^{2+}$ and SO$_4^{2-}$