4A) Mixtures and 4B) Chemical & Physical Changes
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True or False: Suspensions have large, cloudy particles.
True
True or False: Colloids will separate into layers.
False. Colloids stay mixed. Emulsions separate into layers.
The substance being dissolved is the _____.
Solute
The substance that dissolves is the _____.
Solvent
What is a solution?
A mixture in which a soluble liquid or solid is dissolved in a solvent.
True or False: Like compounds, mixtures do not keep the properties of what is consists of.
False, mixtures do keep their properties.
A solution is always _____. The _____ does not settle out, and it cannot be filtered out.
Clear, Solute
True or False: The particles of a suspension are too big to dissolve or pass through a filter.
True
What is an Emulsion?
An emulsion is droplets of liquid suspended in another liquid.
What is the most important solvent in the body?
Water
What is Electrolysis?
A chemical reaction that uses an electric current to break a compound into its elements.
A pipe rusting is a _____ change.
Chemical
Boiling water is a _____ change.
Physical
In a Physical Change, what happens to the molecules?
They stay the same, they gain or lose energy.
In a Chemical Change, what happens to the molecules?
The atoms of the molecule become rearranged.
What is Sublimation?
The change of state directly from solid to gas.
In a Chemical Change, a _____ substance is formed.
New
True or False: In a chemical change, you can reverse the change chemically.
False, chemical changes are very difficult to change.