Chpt 1

Question 1

Physical properties

Answer 1

determined w/o changing the identity of the substance

ExL color, odor, shape, appearance, density, melting/boiling temp, solubility, index of refraction

Question 2

Chemical Properties

Answer 2

determined by the chem changes the substances can undergo. Ex: fire, erosion etc

Question 3

Intensive properties

Answer 3

those that dont depend on the amount of matter being examined

Question 4

Extensive

Answer 4

Depend on amount amnt of matter in the sample being examined Ex: mass, volume

Question 5

Pure Substance

Answer 5

has same intensive properties throughout AND cant be seperated into two or more other substances except by means of chem reaction

Question 6

Element

Answer 6

pure substance that cant be decomposed by ordinary chem methods into simpler substances

Question 7

Compund

Answer 7

two or more elements chem. combined in a definite weight ratio

Question 8

mixtures

Answer 8

comosed of two or more substances (elements or compunds) but not in any particular fixed weight ratio

Question 9

heterogenous mixture

Answer 9

not uniform in its composition and one can see individual particles within it with the naked eye. Sand, wood, oil soil are examples

Question 10

homogenous mixture

Answer 10

uniform composition individual particles cant be seen with naked eye

Question 11

physical methods of separation

Answer 11

dont change the indentity of the substance during a procedure

Question 12

chemical methods of separation

Answer 12

change the identity of the substance during a procedure

Question 13

whats the 6 common methods to separate the components of a mixture

Answer 13

filtration, distilation, solubiity, extraction, fractional crystalization, decanation, evaporation

Question 14

Filtration

Answer 14

used to sepaate insoluble solids form a liquid

Question 15

distillation

Answer 15

used to separate volatile substances equally from non volitile sustances