CH-1347
Separation and purification
Chemistry · Secondary 4 · Medium · Separation and purification
A mixture contains three solids P, Q and R.
• P is soluble in water but insoluble in ethanol.
• Q is insoluble in water but soluble in ethanol.
• R is insoluble in both water and ethanol.
Which sequence of steps will obtain pure P from the mixture?
1 add water
2 filter
3 add ethanol to the residue
4 evaporate the filtrate to dryness
• P is soluble in water but insoluble in ethanol.
• Q is insoluble in water but soluble in ethanol.
• R is insoluble in both water and ethanol.
Which sequence of steps will obtain pure P from the mixture?
1 add water
2 filter
3 add ethanol to the residue
4 evaporate the filtrate to dryness
- 1, 2, 4
- 2, 1, 4
- 3, 2, 4
- 1, 3, 2, 4
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.