WorksheetsAcids and bases
Total questions: 16
Worksheet time: 29mins
In the reaction below, H2O is a(n):
H2SO3 + H2O --> H3O+ + HSO3-
base
acid
conjugate acid
conjugate base
Which compound is the conjugate acid? (Hint: Determine the base)
PO43- + HNO3 ==> NO3- + HPO42-
PO43-
HNO3
NO3-
HPO42-
What is the [H+] if the pH is 4.0?
1.0 x 10-10 M
1.0 x 10-4 M
1.0 x 10-14 M
1.0 x 10-7 M
What is the pH of a 1.53 x 10-6 M solution of HCl?
5.82
8.18
6.99
4.15
Ethanoic acid, CH3COOH, is a weak monoprotic acid. Its concentration is 0.20M and it's Ka value is 1.8 x 10 -5. Calculate it's pH value.
0.698
2.72
11.28
None of the answers are correct
A pH of 3 is how many times more acidic than a pH of 5?
2
20
10
100
What kind of acid is only partly ionised in solution?
weak
strong
ionic
pH
Water has a neutral because
it has more H+ ions than OH-
it has more OH- ions than H+
it does not produce any ions
it has an equal amount of H+ and OH- in solution
Which chemical is a proton donor?
Acid
Base
What is the [OH-] if the [H+] is 1.0 x 10-3 M?
1.0 x 10-3 M
6.02 x 10-23 M
1.0 x 10-14 M
1.0 x 10-11 M
Which of these indicators can be used to show the end point in a titration between ethanoic acid and sodium hydroxide?
Methyl orange
Phenolphthalein
The ionic product of water is 2.92 × 10–14 mol2 dm–6 at 313K. Calculate the pH of pure water at this temperature.
7.00
13.53
6.77
6.50
At 25°C, Kw has the value 1.00 × 10–14 mol2 dm–6. Calculate the pH at 25 °C of 0.150 mol dm–3 solution of sodium hydroxide,
13.00
13.18
12.97
13.10
Calculate the pH of a 0.1 mol dm-3 solution of a weak acid with a pKa value of 4.76 at 298K
2.88
3.88
4.88
5.88
