Evaporation from a Solution

Mix 50 ml of salt, 50 ml of sand and 100ml of water together in a jar. Stir the mixture.

Why did you stir the mixture of salt, sand and water?

• To dissolve the salt in the water and mix the salt and sand

• To dissolve the sand in the water and mix the salt and sand

• To mix the salt and water and dissolve the sand

Now, use the filter funnel and filter paper to filter the mixture into the container.

Why did you filter the mixture?

• To separate the sand and the salt from the water

• To separate the salt from the solution

• To separate the sand from the salt solution

What was left behind on the filter paper?

• salt

• sand

• water

Why did you leave the container of salt solution in a warm place for a day?

• So that they salt will melt and evaporate with the water

• So that the salt will evaporate faster

• So that water could evaporate from the salt solution

Which of these is a solute?

• orang juice

• milo

• tea

• sugar

These are examples of solvent except

• water

• milk

• cocoa

• ethanol

These are ways on how can you get results more quickly in separating salt from water except

• keep the jar in a refrigerator

• use a container with a larger surface such as bowl

• use a fan to blow on the solution

• put the container in a warmer place or in direct sunlight

Choose the factors that affect the process of dissolving solute in a solvent.

• Stirring

• Blowing

• Temperature

• Amount of solvent