Test 2- Chem 112- St. Thomas- Summer

Question 1

True or false, The conjugate base of a strong acid has negligible acid-base properties.

Answer 1

true

Question 2

the bigger Ka/Kb is, the ____ the acid/base is

Answer 2

stronger

Question 3

hydronium

Answer 3

H3O+

Question 4

hydroxide

Answer 4

OH-

Question 5

higher pH means ____ concentration of H30

Answer 5

lower

Question 6

lower pH means ____ concentration of H30

Answer 6

higher

Question 7

Q

Answer 7

the reaction quotient at any time during reaction

Question 8

K

Answer 8

equilibrium constant. Q, ONLY at equilibrium (the END of reaction)

Question 9

Kc>1

Answer 9

favors products

Question 10

Kc=1

Answer 10

they are the same

Question 11

Kc<1

Answer 11

favors reactants

Question 12

Q<K

Answer 12

reaction moves right (forward) to form products

Question 13

Q=K

Answer 13

equilibrium

Question 14

Q>K

Answer 14

reaction moves left (reverse) + forms reactants

Question 15

Le Chatelier’s principle

Answer 15

a system in equilibrium will adjust to a stress by shifting to minimize or alleviate stress types

Question 16

addition of products or reactants does what

Answer 16

shift in the opposite side

Question 17

removal of products or reactants does what

Answer 17

shift in the same side

Question 18

increasing temp does what

Answer 18

moves toward opposite side

Question 19

decreasing temp does what

Answer 19

shifts toward the same side (energy side)

Question 20

input energy (endothermic)

Answer 20

energy side is reactant

Question 21

output energy (exothermic)

Answer 21

energy side is product

Question 22

decrease in volume does what to pressure

Answer 22

increase

Question 23

increase in volume does what to pressure

Answer 23

decrease

Question 24

when does volume/pressure cause a change in equilibrium

Answer 24

when the reaction is with gases, it is a result of a volume change, AND there is a change in moles

Question 25

increase in pressure when all conditions for eq change are met

Answer 25

shift toward the side with fewer gas molecules

Question 26

decrease in pressure when all conditions for eq change are met

Answer 26

shift toward the side with more gas molecules

Question 27

arrhenius definition for acids and bases

Answer 27

acid has H+ when dissolved, base had OH- when dissolved

Question 28

Bronsted-Lowry definition

Answer 28

focuses more on the transfer instead of dissasociation. Acid- donates proton Base- accepts proton

Question 29

conjugate base

Answer 29

deprotanated form of original acid

Question 30

conjugate acid

Answer 30

protonated form of original base

Question 31

ionization

Answer 31

acid-base reactions with water

Question 32

autoionization

Answer 32

happens in every solution with water

Question 33

what is not included in eq constant

Answer 33

liquids and solids(everything else is. g and aq)

Question 34

auto ionization formula

Answer 34

H2O+H2O --> <-- H3O + OH-

Question 35

autoionization only happens in how many cases

Answer 35

in all cases but only in 2 out of 10^9 molecules *VERY small

Question 36

amphoteric

Answer 36

molecules or ions that either gain or lose a proton under appropriate conditions

Question 37

as [H3O] increases, pH levels ___

Answer 37

decrease

Question 38

[H30] > [OH-]

Answer 38

acidic, pH lower

Question 39

[H30] = [OH-]

Answer 39

neutral, pH 7

Question 40

[H30] < [OH-]

Answer 40

basic, pH higher

Question 41

pH <7

Answer 41

acidic

Question 42

pH > 7

Answer 42

basic

Question 43

pH=7

Answer 43

neutral

Question 45

the higher the Ka is, the ____ the acid is

Answer 45

stronger

Question 46

the higher the Kb is, the ____ the base is

Answer 46

stronger

Question 47

% ionization

Answer 47

acid concentration eq/acid concentration original x100

Question 48

conjugate partners of strong acids and bases are ____

Answer 48

neutral

Question 49

conjugate partners of weak acids and weak bases are ___

Answer 49

weak

Question 50

neutralization reaction

Answer 50

acid + base --> salt + (water) always IRREVERSABLE (initial part, use stoich)

Question 51

strong acid/strong base

Answer 51

neutral

Question 52

strong acid/weak base (and why)

Answer 52

con acid does this- slightly acidic

Question 53

weak acid/strong base and why

Answer 53

slightly basic (con base does this)

Question 54

buffers

Answer 54

mixtures of weak acids and bases w conjugate partners (and I think they cause H2O to form??)

Question 55

henderson-hassebach

Answer 55

use in buffers

Question 56

strong acids

Answer 56

HCl HBr HI HNO3 HClO4 H2SO4

Question 57

strong bases

Answer 57

NaOH KOH Ba(OH)2 Sr(OH)2 Ca(OH)2 LiOH