Evaporation as method of separating mixture

1.    It is a method used to separate a mixture of a liquid with dissolved solid.

• Decantation

• Evaporation

• Filtration

• Use of Magnet

In evaporation, it needs _____ to remove the solid solute from the liquid solvent

• heat

• filter

• magnet

• container

Answer explanation

Any kind of heat is applicable. It can be heat from a stove, bonfire, candle and even sun.

What substance is left after the evaporation process?

• Gas substance

• Liquid Substance

• Soluble Substance

• Insoluble substance

Answer explanation

Liquid substance is the substance that becomes gas.

When the mixture has insoluble substance, it does not need evaporation to separate it.

Only soluble substance is left after the process of evaporation

Among the following mixtures, which is not applicable in evaporation as a method of separating mixture?

• water and salt

• water and sugar

• water and powdered juice

• water and whole coffee beans

Answer explanation

salt, sugar and powdered juice are all soluble solid therefore it will dissolve when mix with water whereas whole coffee bean is insoluble so evaporation is not the proper method to use to separate it from water.

Evaporation means going from a liquid to a ____________.

• solid

• liquid

• gas

• plasma

Your Science teacher told you that salt comes from sea water. How can you obtain salt from the seawater?

1. In a Science demonstration, you were tasked to demonstrate the method of separating mixture using evaporation in front of your schoolmates, what is the best way to do it? What materials do you need? Identify each.