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01054_Text_GCSE Activity Window Template.txt
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1999-02-05
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613b
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15 lines
Where wildlife is forced to feed on death
1. Which simple test could be carried out to show the presence of an unacceptable level of acidity in the polluted river?
2. The test in Q1 would not prove that the acid was sulphuric; to do this barium chloride solution could be used.
Write an ionic equation for the reaction of barium ions with sulphate ions.
3. Why are heavy metals such dangerous pollutants?
4. Which common important electrolytic process uses large quantities
of mercury?
5. Where did the expression "mad as a hatter" come from and what is the relevance to this article?