topic 2: classifying matter and mixing/dissolving

Pure substance

Any substance that contains one type of particle ex: water

Elements

Any substance that is made only for one type of atom ex: helium

Compounds

Any substance that contains two or more type of atoms ex: CO2

Mixtures

Any substance that contains two or more pure substances mixed together ex: salt water

Heterogeneous

You can see the different parts. You easily can tell it’s a mixture. ex: Trail mix

Homogeneous

All parts look the same. Hard to tell it’s a mixture. ex: Tea, paint

Suspension

Certain parts eventually settle at the bottom. ex: muddy water

Colloids

all parts stay up and doesn’t settle. ex: chip salsa

Solvent

does the dissolving ex: water

solute

Gets dissolved. ex: ice tea powder

Rate

How fast it dissolves

3 factors that affect the rate of dissolving?

Agitate, Heat, and Crush

Agitate

Shake or stir

Heat

Increases the speed of particles

Crush

Increase the surface area

Solubility

How much can be dissolved

Soluble

Able to dissolve

Insoluble

Unable to dissolve

Saturated

No more solute is able to dissolve any further

Unsaturated

There is still room for solute to be dissolved

Supersaturated

A solution that has hold more solute than it normally can at a given temp. You can tells it’s supersaturated when it’s crystallized