Chapter 20

Question 1

bronsted-lowry acid

Answer 1

proton donor

Question 2

bronsted lowry base

Answer 2

proton acceptor

Question 3

in bronsted-lowry base-acid reactions, the substance with the bigger Ka will act as

Answer 3

the acid

Question 4

acid + metal ->

Answer 4

salt + hydrogen

Question 5

acid + alkali ->

Answer 5

salt + water

Question 6

acid + carbonate ->

Answer 6

salt + co2+ h2o

Question 7

pH =

Answer 7

• log [H+]

Question 8

[H+] is the

Answer 8

concentration of hydrogen ions in the solution

Question 9

Strong acids

Answer 9

completely dissociate

Question 10

[HA]= the concentration of the acid is the same as

Answer 10

[H+] in a monobasic strong acid

Question 11

ph values always given to

Answer 11

2.d.p

Question 12

[H+]

Answer 12

1 x 10-pH

Question 13

In all aqueous solutions and pure water the following equilibrium occurs:

Answer 13

H2O (l) H+(aq) + OH-

Question 14

Kw =

Answer 14

[H+(aq) ][OH-(aq) ]

Question 15

at room temp, kw =

Answer 15

1 x 10 ^-14

Question 16

[OH-] =

Answer 16

[H+]

Question 17

water ionises very slightly so can act as both

Answer 17

acid and a base

Question 18

how is a strong base calculated

Answer 18

from concentration of base and ionic product of water

Question 19

types of basic acids worked out by

Answer 19

no of hydrogen ions in the acid that can be replaced per molecule by metal ions or ammonium to form a SALT

Question 20

conjugate acid-base pair

Answer 20

contains two species that can be interconverted by transfer of a proton

Question 21

ph=

Answer 21

concentration of H+ ions in solution

Question 22

base 10 logarithmic scale of ph means one unit ph change-

Answer 22

10x change in hydrogen concentration

Question 23

smaller ph value=

Answer 23

larger h+ ion concentration

Question 24

in weak acids [H+]=

Answer 24

[A-]

Question 25

in weak acid the [HA] at equilibrium=

Answer 25

[HA] at the start, the dissociation is negligible

Question 26

approximation of weak acid ph Ka=

Answer 26

[H+]^2/[HA]start

Question 27

for a weak monobasic acid [H+]=

Answer 27

square root of Ka x [HA]start

Question 28

weak acid

Answer 28

partially dissociates when dissolved in water

Question 29

pKa

Answer 29

= -log Ka

Question 30

ph of strong diluted acid [H+]=

Answer 30

[H+] old x old volume/new volume

Question 31

ph of strong diluted base [OH-]=

Answer 31

[OH-] old x old volume/new volume