A2: Acids and bases

Question 1

Bronsted-Lowry acid

Answer 1

proton donor

Question 2

Bronsted-Lowry base

Answer 2

proton acceptor

Question 3

What is a conjugate acid-base pair

Answer 3

Two species that can be interconverted by the transfer of a proton

Question 4

Hydronium ion formula

Answer 4

H3O+

Question 5

The number of hydrogen ions in the acid which can be replaced defines the acid as:

Answer 5

Monobasic, dibasic, tribasic

Question 6

pH=

Answer 6

-log[H+]

Question 7

[H+]=

Answer 7

10^-pH

Question 8

Kw=

Answer 8

[H+][OH-]

Question 9

Kw (ionic product of water) value

Answer 9

1x10^-14

Question 10

Ka expression

Answer 10

[H+][A-]/[HA]

Question 11

pKa=

Answer 11

-log(Ka)

Question 12

Ka=

Answer 12

10^-pKa

Question 13

Ka expression after assumptions

Answer 13

[H+]^2/[HA]

Question 14

Assumptions needed to simplify the Ka expression

Answer 14

[H+]=[A-] (neglecting dissociation from water)
[HA]initial = [HA]equilibrium

Question 15

Equivalence point

Answer 15

Volume of one solution that exactly reacts with the volume of the other solution

Question 16

What is an acid-base indicator

Answer 16

A weak acid, HA that has a very different colour to its conjugate base

Question 17

Strong acid - strong base indicator

Answer 17

phenolphthalein or methyl orange

Question 18

Wek acid - strong base indicator

Answer 18

phenolphthalein

Question 19

Strong acid - weak base indicator

Answer 19

methyl orange

Question 20

Weak acid - weak base indicator

Answer 20

None