Which method to use?

Making salts is a topic studied at GCSE Chemistry. Copper (II) sulfate and ammonium sulfate are two salts commonly made at school. Typically, these two salts are made by reacting a base with sulfuric acid.

Here is a GCSE Chemistry problem to solve:

If the bases available are copper (II) oxide (a black powdered solid) and aqueous ammonia (a 1M solution of ammonia in water), describe the method you would use to make each of the salts?

Examples of the salts crystallising in evaporating basins made from experiments performed at school are shown in the gif animations shown below.


Which salt is being crystallised here?


Colourless needles – which product is shown above?

Answers next time.



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