Mixtures
Give one example of a mixture
Cereal with milk, trail mix, or salad.
Name one example of a solution.
Salt water or sugar water.
Which part of a solution is in the greatest amount?
The solvent.
What does “concentration” mean?
The amount of solute compared to the solvent.
True or False: Air is a mixture.
True!
Can mixtures be made of solids, liquids, or gases?
Yes, all three!
Can you easily see the parts of a solution?
→ No, they are mixed completely.
Which part is in the smallest amount?
The solute.
How can you make a solution more concentrated?
Add more solute.
Which is easier to separate: a mixture or a solution?
A mixture
Do substances in a mixture keep or lose their properties?
They keep their separate properties.
What is a solution?
A mixture where one substance dissolves in another.
In salt water, what is the solute and what is the solvent?
Salt = solute; Water = solvent.
How can you make a solution less concentrated?
Add more solvent.
What do salt and sugar do in water?
They dissolve.
What is a mixture?
Two or more substances mixed together that can be separated.
Can you separate a solution back into its parts? and give one example.
Yes, by processes like evaporation, filtration, floatation, Magnetic Attraction, Sifting, Chromatography
What is the “universal solvent”?
Water.
If you put more sugar in lemonade, what happens?
It becomes more concentrated (sweeter).
What happens when you mix oil and water?
They don’t mix! Oil floats on top because it’s less dense than water
How can you separate a mixture?
By physical methods, like filtering, picking out pieces, or evaporation
What happens when you add more solute to a solution?
It becomes more concentrated.
Why is water called the universal solvent?
Because it dissolves many substances.
What happens to the concentration if you add water to soup?
It becomes less concentrated.
What happens if you keep adding salt to water and it stops dissolving?
The solution becomes saturated.