Acids and bases

Question 1

Define pH

Answer 1

-log[H+]

Question 2

Define bronsted-lowry acid

Answer 2

Proton donor

Question 3

Define bronsted-lowry base

Answer 3

Proton acceptor

Question 4

Define bronsted-lowry acid-base reaction

Answer 4

Reaction involving the transfer of a proton

Question 5

Define conjugate base

Answer 5

Substance formed when acid has lost proton

eg: HBr —> Br-

Question 6

Define monoprotic acid

Answer 6

Acid that releases one H+ per molecule

Question 7

Define diprotic acid

Answer 7

Acid that releases two H+ per molecule

Question 8

How do you work out [H+] from pH?

Answer 8

10^-pH

Question 9

How many decimal places do you give pH to?

Answer 9

2

Question 10

How do you work out dilution of a strong acid?

Answer 10

conc of H+ x old volume / new volume

Question 11

Why is the ionic product of water [H+] [OH-]?

4

Answer 11

kc of water is [H+] [OH-] / [H2O]

therefore kc [H2O] = [H+} [OH-]

as [H2O] is much bigger than [H+] and [OH-} so [H2O] is effectively a constant number

therefore kc [H2O] = Kw = [H+] [OH-]