The Particle Theory
What is a particle?
A tiny piece of matter we cannot see.
When a liquid changes to a solid, it is called?
Freezing
Pizza
Mixture
Describe a homogenous mixture.
2 or more substances that have not been chemically bonded.
Cannot see the different parts of the mixture.
Also known as a solution.
Particles are evenly distributed and have the same composition and properties.
The science term meaning "to mix completely"?
Dissolve
Particles move faster when this happens to them.
When they are heated.
This state of matter has a fixed shape.
Solid.
Salt
Pure Substance
Describe a heterogeneous mixture.
2 or more very distinguishable substances.
not evenly mixed.
easy to separate the substances in the mixture
Identify the solute in a fruit juice solution experiment.
The drink crystals/liquid
Particles are doing this all the time.
Moving
Which two states of matter can flow?
Liquid and Gas.
Air
Mixture (Solution)
What type of mixture is chocolate milk? Why?
The composition is uniform. The substance are not easily separated.
Name two substances that are insoluble.
Oil, sand, rocks, paper, flour, etc.
True or False: Particles in a solid are touching.
False - All particles have empty spaces between them.
In which state of matter are the particles farthest apart?
Gas.
Aluminum Foil
Pure Substance
What type of mixture is pizza? Why?
Heterogeneous. You can see the different parts.
What factors affect solubility? Explain each one.
Temperature- hot water dissolves a solute more quickly.
Pressure- ex. the gas solute in a can of pop will disappear if the can is opened.
polarity- negative or positive electric charge. Substances with similar polarities tend to be soluble in one another
The Particle Theory states this about particles in a pure substance.
Particles are identical (all the same) in a pure substance.
Describe the particles in a solid.
Vibrating/moving very slowly
small spaces between
water
Pure substance (compound)
Give two examples of each a heterogeneous and homogeneous substance.
heterogeneous- pizza, salad
homogeneous- coffee, vinegar
solubility
In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.