Essential Chemistry for IGCSE - Making And Identifying Salts (Section 4 - No. 13)

Which of the following can be used to identify the presence of sulfate ions?

Barium chloride solution

Sodium hydroxide solution

Hydrochloric acid

Litmus paper

Barium chloride solution is used to test for the presence of sulfate ions; it forms a white precipitate of barium sulfate.