Choice Board

Each of these options shows a mixture. Can you separate out the salt (optional: find its mass)?

Water, sand and salt

Sand and salt mixture

Oil, water and salt

A

B

C

Notes for choice board

1. After teaching the techniques, give students this choice board allow them to do as many as possible
2. In general, the challenge increases from left to right however A and C are very similar
3. Can be done using materials from home
4. Allow students to video their experiment as a demo and send the media file to you (e.g. on google classroom, flipgrid, etc.)
5. Connects to dissociation, solubility and homogeneous vs heterogeneous mixtures

Can you use any of the following slides to extend this activity?

Essential Question

Two beakers have different amounts of water in it. One of them has sugar added and the other has salt. More salt was added than sugar.

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Design a procedure that identifies which beaker has the salt in it?

Essential Question

During the winter, the city of montreal claims to use X lbs of salt for each cubic meter of snow. Design an experiment to validate or refute this claim.

Essential Question

Some pools use Salt instead of Chlorine to disinfect the water. In a 90000 L pool, it is important to have between 243 kg and 306 kg of salt. Design an experiment that can check if a given sample of pool water has an acceptable amount of salt.

Essential Question

In Quebec, Iron is mined from Bloom Lake Mine. Unfortunately, a neighbouring town reports that their tap water started tasting metallic and the colour has become brown. Design an experiment that could check if there is iron in the water supply.

Robin ran experiments to test out the law of conservation of matter. Robin mixed chemical A and B together.

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Can you help Robin design an experiment to confirm that matter was conserved after the reaction?