Pure Substances
An pure substance consists of only __________ type of particles throughout.
one
A mixture consists of matter that contains ______________ pure substances chemically bound to each other.
two or more
In heterogeneous mixtures, particles are distributed ________________.
unevenly.
The definition and example of a solvent.
Solvent: A substance that dissolves a solute (ex., water)
Anything that takes up space and has mass.
Matter
True or false: Iron is an pure substance.
True.
What is the definition of a solution? Is it Homogeneous or Heterogenous?
A homogenous mixture of 2+ substances (ex., salt + water)
What is another term we can use for homogeneous mixtures?
Solution
The definition and example of a solute
A substance that dissolves in a solvent (ex., salt)
All matter is made up of ___________________.
many tiny particles that we can not see
What are Particles?
Particles are the smallest unit of matter, we can also think of them as the building blocks of matter.
True or false: Sodium is a solution.
False!
Sodium is a pure substance.
Provide 3 examples of heterogeneous mixtures.
Good work!
What is saturation? How can you tell when a solution is saturated?
What happens when you add more solute to a solution than a solvent can handle. The solute will build up on the top or bottom and no longer dissolve.
All __________ are made up of the same kind of particle (atom).
Pure substances
What does it mean to dilute a solution?
Add more solvent to the solution
AND/OR
Reduce the amount of solute inside a solution
Is distilled water a pure substance or a mixture?
Distilled water is a pure substance because it is composed solely of water molecules (H20) and has a uniform and definite composition. The distillation process removes dissolved substances like minerals and salts, making it different from tap water, which is a mixture.
Is a heterogeneous mixture chemically combined?
*hint* Think about solutions.
No. Heterogeneous mixtures are combined but not chemically like solutions.
Does mixing oil and water create a homogeneous mixture? Why or why not?
Mixing oil and water creates a heterogeneous mixture because we can see the oil and the water.
True or false: The particles in boiling water are moving slower than the particles in an ice cube.
False.
Particles at higher temperature move faster than those at lower temperature.
What is the most common element in the universe?
Hydrogen.
What does it mean to concentrate a solution?
Add more solute to the solution.
AND/OR
Reduce the amount of solvent in the solution.
If a person has a coffee with milk, a Caesar salad, trail mix and a yogurt for lunch, which of the these are heterogeneous mixtures?
Caesar salad and trail mix are heterogeneous mixtures.
What are ALL SIX separation methods we discussed in class?
1.
2.
3.
4.
5.
6.
Sorting
Sifting
Filtration
Evaporation
Magnetism
Distillation
Are you more likely to get a flat bike tire in the summer or winter?
Summer.
Bike tires expand in the heat due to the air inside expanding, which increases pressure and can lead to a higher risk of flats or blowouts.