Tests for Sulfate using Barium Chloride

Question 1

Describe the process to test for sulfate using barium chloride.

Answer 1

1. Add dilute HCl
2. Add barium chloride solution
3. Observe precipitate colour

Question 2

Why do we add hydrochloric acid (HCl) first?

Answer 2

To react with carbonate and sulfite ions that would interfere with results.

Question 3

What colour precipitate do sulfate ions (SO₄^2-) form with barium chloride (BaCl₂)?

Answer 3

White