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Separating Mixtures
Solutions
Reversible and Irreversible Changes
Vocabulary
Other
100
What is a way to separate a mixture of solids?
sieves, air, water, magnets
100
What is a solution?
A mixture where the solute is dissolved into a solvent
100
What change is ice melting into water an example of?
A reversible change
100
What is a solute?
The substance that is being dissolved
100
What is more dense dish soap or vegetable oil?
Dish soap is more dense
200
How can you separate nails from gumballs?
Using a magnet
200
Is a mixture of lemon juice and water a solution?
yes
200
Is adding blue food colouring to water so it turns blue and example of a reversible or irreversible change?
Reversible because you can separate the food colouring because the new colour is not a new product.
200
What is a solvent?
The substance doing the dissolving
200
Name the states of matter.
solid, liquid, gas
300
Explain decanting
A separation technique where part of the mixture is poured out and the other part remains in the original container.
300
Is cold water or hot water better for dissolving solutes?
hot water
300
Is Diet Coke and Mentos and example of an irreversible change?
Yes, because there are bubbles formed
300
What is a saturated solution?
A solution that cannot hold anymore solute
300

A liquid changes the litmus paper pink, is it an acid, a base or neutral?

It is an acid.

400
If you have a solution of sugar and water, how can you separate the dissolved sugar form the water?
By using evaporation.
400

What reactions make carbon dioxide?

Vinegar and baking soda

400
How do you know an irreversible change has happened?
There is a new substance formed, there is a colour change, there are bubbles or energy is released.
400

What is a chemical reaction?

A reaction between two substances that creates a new substance.

400
If liquids layer, where will the most dense liquids be?
At the bottom.
500
How do you separate paper, large rocks and staples.
You can use a magnet to separate the staples and air or water separation to separate the rocks and paper.
500

Is salad dressing made with oil, vinegar, and garlic a solution?

No, oil and garlic do not dissolve.

500
A gas fireplace is turned on and then turned off. Is this an example of an irreversible or reversible change?
An irreversible change because there is a change in colour and energy is released.
500

What is distillation?

The action of purifying a liquid by a process of heating and cooling. 

500

Jimmy sets up a scale with a paper bag on each side. One bag is left open. Jimmy produces CO2 and directs it into the other bag. What will Jimmy observe?

The closed, CO2 bag will tip the scale down, as CO2 is heavier than air.