Sulphate Ion Test Quiz

Why is dilute hydrochloric acid added to the sample before testing for sulphate ions?

• To remove impurities like carbonates

• To increase the concentration of sulphate ions

• To change the color of the sample

• To neutralize the sample

What indicates the presence of sulphate ions when barium chloride is added?

• A color change to blue

• A temperature increase

• Formation of a bright white precipitate

• Emission of a gas

Which compound forms the white precipitate in the sulphate ion test?

• Magnesium chloride

• Barium sulfate

• Sodium sulfate

• Calcium carbonate

What type of reaction occurs between barium chloride and magnesium sulfate?

• Single displacement

• Double substitution

• Combustion

• Decomposition

In the ionic equation for the sulphate ion test, which ions are directly involved?

• Sulfate and barium ions

• Hydrogen and oxygen ions

• Sodium and potassium ions

• Magnesium and chloride ions