LSS Separation techniques (Part 1)

The separation methods (filtration, evaporation and distillation) can only be used to separate mixtures.

• True

• False

Which method should I use to separate ferrous metal from trash?

• Distillation

• Evaporation to dryness

• Filtration

• Magnetic attraction

Filtration is a separation method based on _______

• Different boiling points

• Different particle size

• Different pore size of filter

• Different solubility

Filtration will not work if I don't wet the filter paper beforehand.

• True

• False

I filtered a suspension containing sand and chalk in water. What is the residue?

• Sand only

• Chalk only

• Sand and chalk only

• No residue is left behind

Evaporation is a process used to obtain the solvent from the solution.

• True

• False

For evaporation to dryness to work, the solute must ______

• Be able to withstand heating

• Be soluble in the solvent

• Be denser than the solvent

Distillation is a process that separates substances based on ______

• Difference in melting point

• Difference in boiling point

• Difference in states of matter

• Difference in solubility

Why do we place the thermometer above the solution?

• To measure the melting point of the substance

• To measure the boiling point of the substance

• To ensure that the temperature constantly increases

• To ensure that the temperature is constant

Why does water enter the condenser from the bottom?

• To ensure that the water is cold for condensation to occur

• To ensure that there is a constant supply of water

• To ensure that the entire condenser is filled up

• To ensure that all the gas condenses fully since the end is cooler