PAra el ultimo examen del semestre

mixture

made of 2 or mire substances that are together in the same place, but they are not chemically bonded

heterogeneous mixture

features distinct components that can be easily be seen and sorted

A spaghetti is an example of a ___________ mixture

heterogeneous

homogeneous mixture

often look the same throughout the entire mixrure

colloid

a heterogenous mixture containing small, undissolved particles that don't separate

Paint, whipped cream, fog and smoke are examples of

colloids

suspension

mixture with particles that can be seen and easily seperated by setting or filtration

Muddy water and orange juice is an example of

suspension

solution

a homogeneous mixture of the solution that usually present in the largest amount

solvent

the part of the solution that is usually present in the largest amount

solute

the substance that is dissolved by the solvent

Boiling point, freezing point, and density are

physical properties that are affected by concentration

Concentration increases by

adding more solute or removing the solvent

solubility

the measure of how much solute will disolve in a solvent

The properties of solute and solvent

affect solubility

raising the temperature of the solvent increases

the solubility of a solid solute

gases become less soluble when temperature is

increasing

The solubility of gaseous solute increases as

pressure on the solution increases

Chemical reaction is the same as

chemical changes

physical change

change that alters the form or appearance of a substance without changing it into a different substance

Slicing, breaking, freezing, boiling, melting and stretching are examples of

physical changes

Density, conductivity, malleability, melting point, freezing point and boiling point are characteristics

of physical change

chemical change

change in matter that produces one or nore new substances

Burning and rust are examples of

chemical change

reactant

substance that enters into a chemical reaction

product

substance formed as a result of a chemical reaction

Chemical changes occur when existing bonds ______ and new bonds ____

break, form

A color change may signal that a new substance has ________ in an otherwise ________ object

formed, unchanged

The only way to be certain that any chemical reaction has taken place is the presence of

one or more new substances

exothermic reaction

a reaction that releases energy, usually in the form of heat

endothermic reaction

a reaction that absorbs energy

activation energy

the minimum amount of energy needed to start a chemical reaction