Card Set Information
Chemistry Tests Study
Review over the first unit of Pre-AP Chemistry.
Substance -or- Pure Substance
Matter that has a uniform and unchanging composition.
Can be observed without changing composition.
: Density, color, odor, taste, hardness, melting point, boiling point, malleability, ductility.
A physical property that is dependent on the amount of matter (mass, weight). Also known as quantitative.
A physical property that is not dependent on the amount of matter (taste, etc).
Require a chemical reaction on order to be observed.
Ability or inability to change into one or more other substances.
Standard Temperature and Pressure
4 States of Matter:
All matter can exist in the first three states if conditions allow.
Definite shape and volume.
Takes the shape of the container.
Particles slide over one another.
Expands to fill entire container.
Particles are far apart and always moving.
NOT the same as
A change in appearance, etc, but
Involves one or more substances changing into new substances.
Starting substances are called the reactants, resulting substances are called the products.
Indications of a chemical change:
Color change, gas production (bubbles, odor), energy changes.
Release of heat.
Absorption of heat.
Law of Conservation of Mass
Mass is neither created nor destroyed.
Mass reactants = mass products.
Consists of only one kind of atom.
Cannot be broken down by chemical OR physical means.
Can exist as either atoms or molecules.
Consists of two or more elements bound together.
Can be broken down by chemical means, but not physical means.
Consists of two or more elements a/o compounds physically combined.
Can be separated by physical means.
Does not blend smoothly throughout.
Substances remain distinguishable.
: Colloids, suspensions.
Constant composition throughout.
Also called solutions.
Can be solid, liquid, or gas.
Mixtures can be separated by _________ means.
Mixtures can be separated by physical means.
A technique that uses a pourous barrier to separate suspensions.
: Mud from water.
Mixture is heated until the substance with the lowest boiling point boils to a vapor that can be condensed.
Formation of pure solid particles of a substance from a
solution containing a dissolved substance.
Separates components based on the tendency of each to travel or be drawn across the surface of another material.
Refers to how close a measurement is to an accepted value.
Refers to how close a series of measurements are to one another.
Smallest part of an element that retains the property of that element.
Smallest particle of a covalent compound that retains properties of that compound.
Made of 2 or more atoms.
Individual charged particles in an ionic compound.
Smallest ratio of ions in an ionic compound.
A specific amount of a substance.
: 6.02 x 10
Mass of one mole of a substance in grams.
Can be obtained or calculated from the periodic table.