Chapter 4 Flashcards
(18 cards)
Explain magnetic attraction.
Magnetic attraction is used to separate magnetic materials from non-magnetic materials.
Explain filtration.
Filtration is the technique used to separate an insoluble solid
from the liquid in a solid-liquid mixture (suspension).
How do we use filtration in our daily lives?
Separating tea leaves from tea using a tea strainer.
Explain evaporation.
Evaporation is a process of obtaining a soluble solid from a solution by heating the solution until all the water has boiled off.
Explain distillation.
Distillation is used to obtain a pure solvent (liquid) from a solution.
Why must the bulb of the thermometer be placed at the mouth of the condenser?
To ensure that the
measured temperature is accurate to the known boiling point of the pure substance.
What is a precaution regarding the thermometer in distillation?
The bulb of the thermometer should be placed at the mouth of the condenser to ensure accurate temperature measurement of the boiling point of the pure substance.
How should water flow in the condenser during simple distillation?
Water should flow ‘in’ from the bottom of the condenser and ‘out’ from the top to ensure the outer jacket is completely filled.
What is the purpose of boiling chips in distillation?
To ensure smooth boiling.
Which separation technique is based on differences in boiling points?
Distillation
What is a common use of chromatography?
To separate and identify different components in a mixture.
What does the term ‘solubility’ refer to?
The ability of a substance to dissolve in a solvent.
True or False: In distillation, the vapors are cooled to form a liquid again.
True
What type of mixtures can be separated by magnetic separation?
Mixtures containing magnetic and non-magnetic materials.
What is the role of the stationary phase in chromatography?
To provide a medium for the separation of components based on their movement.
Multiple Choice: Which technique would you use to separate salt from seawater? A) Filtration B) Distillation C) Centrifugation D) Chromatography
B) Distillation
True or False: The more soluble a substance is, the faster it moves in chromatography.
True
True or False: All separation techniques can be used for all types of mixtures.
False
