Chem 111 Exam 2

Front 1

Avogadro's number

Back 1

6.02 x 10^23

Front 2

mass percent of element

Back 2

(mass of element in compound)/(mass of sample of compound)

Front 3

strong electrolyte solution

Back 3

substance that completely dissociates into ions in solution

Front 4

solvent

Back 4

the majority component in a solution

Front 5

solute

Back 5

the minority component in a solution

Front 6

solubility

Back 6

the amount of compound that will dissolve in a certain amount of liquid

Front 7

electrolyte solution

Back 7

a solution containing a solute that dissociates into ions

Front 8

nonelectrolyte solution

Back 8

a solution that cannot conduct electricity

Front 9

mass percent

Back 9

(mass solute)/(mass solution) x 100%

Front 10

molarity(M)

Back 10

(moles solute)/(liters solution)

Front 11

molality(m)

Back 11

moles solute/kilograms solvent

Front 12

Freezing Point Depression

Back 12

ΔTf = m x Kf

Front 13

Boiling Point Elevation

Back 13

ΔTb = m x Kb

Front 14

osmosis

Back 14

the flow of solvent from a less concentrated solution to a more concentrated solution

Front 15

semipermeable membrane

Back 15

a membrane that selectively allows some substances to pass through but not others

Front 16

osmotic pressure

Back 16

the pressure required to stop the osmotic flow

Front 17

carboxylic acid

Back 17

an acid containing COOH

Front 18

alkaloids

Back 18

organic bases found in plants

Front 19

the Arrhenius Definition

Back 19

Acid- produces H+ ions in aq
Base- produces OH- ions in aq

Front 20

hydronium ion

Back 20

H3O+

Front 21

Bronsted-Lowry definition

Back 21

Acid- proton (H+ ion) donor
Base- proton (H+ ion) acceptor

Front 22

amphoteric

Back 22

substances that can act as acids or bases

Front 23

salt

Back 23

an ionic compound

Front 24

titration

Back 24

a substance in a solution of known concentration is reacted with another substance in a solution of unknown concentration

Front 25

equivalence point

Back 25

the point in titration when the # of moles of OH- added equals the # of moles of H+ originally in solution

Front 26

strong acid

Back 26

on that completely ionizes in solution

Front 27

strong electrolyte

Back 27

a substance whose aqueous solutions are good conductors of electricity

Front 28

strong base

Back 28

one that completely dissociates in solution

Front 29

ion product constant for water(Kw)

Back 29

Kw = [H3O+][OH-]

Front 30

buffer

Back 30

resists pH change by neutralizing added acid or added base