CH-445
Separation and purification
Chemistry · Secondary 3 · Medium · Separation and purification
A student wants to obtain pure dry crystals of sodium chloride from a mixture of sodium chloride solution and sand. Which sequence of steps should be carried out?
A Filter → evaporate filtrate to dryness
B Filter → wash residue → dry residue
C Evaporate mixture to dryness → crush solid
D Decant liquid → dry residue
A Filter → evaporate filtrate to dryness
B Filter → wash residue → dry residue
C Evaporate mixture to dryness → crush solid
D Decant liquid → dry residue
- Filter → evaporate filtrate to dryness
- Filter → wash residue → dry residue
- Evaporate mixture to dryness → crush solid
- Decant liquid → dry residue
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