CH-1382
Separation and purification
Chemistry · Secondary 4 · Medium · Separation and purification
A mixture contains three solids A, B and C. Their solubilities are:
- A: soluble in water, insoluble in ethanol
- B: insoluble in water, soluble in ethanol
- C: insoluble in both water and ethanol
Which sequence of steps will obtain pure solid B?
1 add water 2 filter 3 add ethanol to residue 4 evaporate filtrate to dryness
- A: soluble in water, insoluble in ethanol
- B: insoluble in water, soluble in ethanol
- C: insoluble in both water and ethanol
Which sequence of steps will obtain pure solid B?
1 add water 2 filter 3 add ethanol to residue 4 evaporate filtrate to dryness
- 1, 2, 3, 4
- 3, 2, 4, 1
- 2, 1, 3, 4
- 1, 3, 2, 4
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