Chapter 4: Exploring Diversity of Matter Using Separation Techniques Flashcards
How can magnetic and non magnetic substances be separated?
By magnetic attraction (a separation technique)
How can substances with different particle size be separated?
By filtration (a separation technique)
How can dissolved solids be separated to obtain a solid?
Evaporation (separation technique)
How can substances with different boiling points be separated to obtain a liquid?
Distillation (separation technique)
How can substances that dissolve to different extents in a solvent be separated?
Chromatography (separation technique)
The National four taps of Singapore
- Water from local catchment
- Imported water
- NEWater
- Desalinated water
What is the purpose of boiling chips in simple distillation?
To ensure smooth boiling
Where should the thermometer be in simple distillation?
Beside the side arm leading to the condenser
After separating let’s say, saltwater, what do you get?
The water would be collected as distillate while the salt will be collected as residue.
What does it mean if a component in chromatography travels up faster than the rest?
That means it is more soluble than the rest.
What is micro filtration/ ultrafiltration for?
To filter microscopic particles including bacteria
What is reverse osmosis for?
To remove undesirable contaminants including viruses
After separating let’s say, saltwater, what do you get?
The water would be collected as distillate while the salt will be collected as residue.
Where should the thermometer be in simple distillation?
Beside the side arm leading to the condenser
Why is the starting line of a chromatogram drawn in pencil?
So that it doesn’t dissolve in the solvent and affect the results.
