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Sulphates and Halides for SQA Higher Chemistry
This page covers the following topics:
1. Identification of sulphate solutions
2. Identification of halides
Sulphate ions in solution, can be detected using barium chloride solution.
Halide ions are the ions of the halogens. Halide ions in solution are detected using silver nitrate solution.
1
What are the halogens?
Elements in Group 7 of the periodic table.
2
What is the precipitate that forms?
Barium sulphate.
3
What colour precipitate do bromide ions give? What is this precipitate?
Cream; silver bromide.
4
What colour precipitate do chloride ions give? What is this precipitate?
white, silver chloride
5
Why can we not used sulphuric acid when adding drops of acid to the original solution?
It contains sulphate ions - these would interfere with the test results.
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