2.4 en herhaling 2.3

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

Which methods of separation did you use to separate salt from sand?

1. sedimentation-distillation-evaporation
2. sedimentation-filtration-evaporation
3. extraction-distillation-evaporation
4. extraction-filtration-evaporation

After filtration, the ........ can be found in the funnel.

1. filtrate
2. residue
3. distillate
4. emulsifier

You are mixing sugar with water. After a while, the sugar does not dissolve anymore. The solution has become:

1. Saturated
2. Unsaturated

Emulsions can be separated via filtration

1. Yes
2. No

If you want to dissolve more sugar, what do you have to do?

1. Be patient
2. Decrease the temperature
3. Increase the pressure
4. Increase the temperature

If you want to dissolve more oxygen, what do you have to do?

1. Be patient
2. Decrease the temperature
3. Increase the pressure
4. Increase the temperature

Wat is de maximale oplosbaarheid bij 25 graden Celsius.

1. 250 gL-1
2. 200 gL-1
3. 225 gL-1
4. 275 gL-1

Calculate the percentage by volume of 345mL in 453 L mixture

1. 0,762
2. 0,000762
3. 76.2
4. 0,0762