Filtration and Evaporation

Filtration and Evaporation

Multiple Choice

Why can mixtures be separated relatively easily?

• Mixtures can be easily separated as the particles of each substance are chemically joined

  (bonded) to each other.

• Mixtures can be easily separated as the particles of each substance are NOT chemically joined

  (bonded) to each other.

Multiple Choice

Evaporation is the change of state from ____ to ____

• liquid to solid

• solid to liquid

• liquid to gas

• gas to liquid

Multiple Choice

Arrange the steps to separate pure salt from rock salt.

A. Stir the mixture

B. Crush up the rock salt using mortar and pestle.

C. Heat the filtrate.

D. Filter the mixture.

E. Put the crushed rock salt into a beaker and add water.

• B - A - E- D - C

• B - E - A - D - C

• B - E - D - A - C

Multiple Choice

Arrange these pictures in the correct order to show how to separate pure salt from rock salt.

• D- A- C- B

• C- D- A- B

• D- C- A- B

• C- D- B- A

Scenario 1

When sand and water are mixed together in a beaker, the sand does not dissolve.

To separate the sand out from the water, you must pour the mixture

through a piece of filter paper, folded into a funnel and with a conical

flask placed underneath. The sand should remain trapped in the filter

paper and the water in the conical flask should now be clear.

Multiple Choice

Q: Sand does not dissolve in water, so we call it _____

• solute

• solvent

• soluble

• insoluble

Multiple Choice

Q: The sand and water together in the beaker is called a

• solvent

• solution

• mixture

• solute

Multiple Choice

Q: The sand is the _______ because _______

• residue because it is left behind in the filter paper.

• filtrate because it is left behind in the filter paper.

• residue because it has passed though the filter.

• residue because it has passed though the filter.

Multiple Choice

Q: The liquid at the end of the experiment is called the ____________ because _________>

• the residue because it has passed through the filter

• the filtrate because it has passed through the filter

• the filtrate because it is left behind in the filter paper

• the residue because it is left behind in the filter paper

Multiple Choice

Q: The paper is the ______ because ______.

• filter because it is the material the filtrate passes through.

• residue because it is left behind in the filter paper.

• filtrate because it has passed through the filter.

Open Ended

Explain why sand can be separated from water using this technique.

Open Ended

Siddiqui carries out the experiment as described in scenario 1. However, his water still has sand in it. Suggest what Siddiqui might have done wrong.

Open Ended

Siddiqui carries out the experiment as described in scenario 1. However, his water still has sand in it. How could you improve Siddiqui’s experiment to ensure clear water?

Open Ended

Marissa carries out the experiment as described in question 1, but uses salt instead of sand. Describe what the particles would look like in the end filtrate.