Mixtures
Concentration
Solubility
Separating Solutions
Application
100
How do you know if a mixture is mechanical?
You can see all the different substances it is made up of.
100
Concentration tells us how much __________ in a _________.
solute, solution
100
Define solubility.
How easily a solute dissolves in a solvent.
100
How can you separate rocks from water?
Filter
100
Give an example of a solution.
tap water, apple juice, black coffee
200
What is a solution?
A mixture with a uniform appearance - you cannot see the different parts.
200
What units do we use to describe concentration?
g/L
200
What does soluble mean?
A substance can dissolve in a solvent.
200
How can you separate salt from water?
Boil or distillation
200
Give an example of a mechanical mixture.
Granola, trail mix
300
Define solute.
A substance that dissolves in another substance.
300
Why is it important to have concentration on consumer products such as weed killer?
It is important for product safety and effective use. Prevents dangerous and/or harmful use.
300
What does insoluble mean?
A substance cannot dissolve in a solvent.
300
What is sedimentation?
Separating parts of a mixture based on their different densities (how heavy it is). Heavy substances sink to the bottom making it easy to separate.
300
What is the 1st and 2nd steps to water treatment?
1. Add alum to water making particles heavy. 2. Heavy particles sink to the bottom and clear water is removed.
400
What is the solute and what is the solvent? sugar dissolves in black coffee.
Sugar is the solute and black coffee is the solvent.
400
The label of Roundup (weed killer) states that there is 7g/L of glyphosate. What does this mean?
There is 7g of glyphosate in 1L of the product.
400
Give an example of something that is soluble in water.
sugar, salt,
400
What element is added to water to remove bacteria and make it safe for drinking?
Chlorine
400
What are the 3rd and 4th steps to water purification?
3. Filters remove the solid particles. 4. Chemicals, like chlorine, are added to water to kill bacteria.
500
In a compound, 55% is silver and 45% is lead. What is the solute and what is the solvent?
Lead is the solute and silver is the solvent.
500
Give an example (other than Roundup) that provides the concentration on the label. It doesn't need to be specific.
acids, bases, cleaning products.
500
Give an example of something that is insoluble in water.
Oil, sand, pebbles
500
Define distillation.
The process of boiling water, collecting the steam, and letting it cool to form pure water.
500
If you were camping, explain how you would purify muddy water to make it safe to drink. Give three points.
Collect the water, filter through a porous leaf, t-shirt, etc, boil over a fire.
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