CH-1020
Preparing salts
Chemistry · Secondary 4 · Medium · Preparing salts
A student wants to prepare pure crystals of copper(II) sulfate by reacting excess copper(II) oxide with dilute sulfuric acid.
Which is the correct order of steps?
1 Filter the mixture.
2 Warm the acid.
3 Add excess copper(II) oxide.
4 Evaporate the filtrate to crystallisation point.
5 Dry the crystals between filter papers.
Which is the correct order of steps?
1 Filter the mixture.
2 Warm the acid.
3 Add excess copper(II) oxide.
4 Evaporate the filtrate to crystallisation point.
5 Dry the crystals between filter papers.
- 2, 3, 1, 4, 5
- 2, 1, 3, 4, 5
- 3, 2, 1, 4, 5
- 2, 3, 4, 1, 5
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