Testing Water Purity
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- Created by: Qiao-Chu
- Created on: 14-04-13 15:08
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Water companies test water regularly to ensure pollutant levels do not exceed limits. Can test for dissolved ions using precipitation reactions.
1. Test for sulphate ions using barium chloride:
- Add dilute hydrochloric acid to test sample.
- Add 10 drops of barium chloride solution.
- If white precipitate, there are sulphate ions in sample.
- Barium ions + sulphate ions --> barium sulphate
- Ba2+ + SO42- --> BaSO4
Barium chloride + postassium…
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