Orgo Lab Midterm

Front 1

technique used to separate compounds based on differences in boiling point

Back 1

distillation

Front 2

compounds with a high vapor pressure and low boiling point are

Back 2

volatile

Front 3

occurs at temperatures bellow the compunctions boiling point, and results in the transition from liquid to vapor of only the molecules on the liquids surface

Back 3

evaporation

Front 4

pressure exerted by the gaseous molecules on the walls of the container

Back 4

equilibrium vapor pressure

Front 5

the vapor pressure of the liquid is equal to the external pressure applied to the surface of the liquid

Back 5

boiling point

Front 6

Vapor pressure of two volatile compounds

Back 6

Pt = P1X1 + P2X2

Front 7

when two liquids form a homogeneous solution they are

Back 7

miscible

Front 8

the vapor produced by distillation that rises and is reliquified

Back 8

distillate

Front 9

seperation of compunds occurs in one vaporization step

Back 9

simple distillation

Front 10

has the effect of many simple distillations

Back 10

fractional distillation

Front 11

used when the bp of compounds differ by less than 40 degrees

Back 11

fractional distillation

Front 12

each condensation and revaporization that occurs on a fractionating column

Back 12

theoretical plate

Front 13

temperature in which the solid is in equilibrium with tits liquid

Back 13

melting point

Front 14

traces of solvents appear as droplets on the outside surface of the sample

Back 14

sweating

Front 15

a purification process used to remove impurities from organic compounds that are solid at room temperature

Back 15

recrystalization

Front 16

occurs when a compound is insoluble in a solution at a temperature above the compounds melting point

Back 16

oiling out

Front 17

remainings olvent from which the crystals are filtered from

Back 17

mother liquor

Front 18

a technique for analyzing, identifying, or seperating mixtures of compounds

Back 18

chromatography

Front 19

mobile phase of TLC

Back 19

eluent

Front 20

stationary phase of TLC

Back 20

TLC plate

Front 21

covered container with a shallow layer of the mobile phase liquid at the bottom

Back 21

developing chamber

Front 22

tlc plate after seperation is complete

Back 22

chromatogram

Front 23

ratio of the distance a compound moves to the distance that the eluent from moves

Back 23

retention factor

Front 24

mobile phase of column chromatography

Back 24

eluent/solvent

Front 25

stationary phase of column chromatography

Back 25

solid absorbent

Front 26

selectively dissolves one or more of the mixtures compounds into an appropriate solvent

Back 26

extraction

Front 27

solution of the dissolved compounds

Back 27

extract

Front 28

suspension of small drops of one liquid in another liquid

Back 28

emulsion

Front 29

mobile phase of Gas chromatography

Back 29

inert gas

Front 30

stationary phase of Gas chromatography

Back 30

liquid film supported on a solid

Front 31

time required for the compound to pass through the column

Back 31

retention time

Front 32

contain heated filaments whose electrical resistance varies with temperature

Back 32

thermal conductivity detectors

Front 33

stream from collumn passes through hydrogen flame and the ions formed by the combustion of the compound are captured by a grid to produce a current

Back 33

flame ionization detector

Front 34

control the sensitivity of the instrument and the amplitude of the peaks on the chart

Back 34

attenuation