CH-449
Separation and purification
Chemistry · Secondary 3 · Medium · Separation and purification
A student wants to separate a mixture of sand and copper(II) sulfate crystals. Which sequence of methods should be used to obtain dry copper(II) sulfate crystals?
- Filtration → evaporation
- Dissolve in water → filtration → evaporation
- Dissolve in water → evaporation → filtration
- Evaporation → filtration
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