SA Topic 8: Acids and Bases – SL
Name:_______________________
Multiple Choice: Each worth 1 mark. Place BEST answer on the answer sheet provided.
1.
Which species behave as Brønsted-Lowry acids in the following reversible reaction?
H2PO4–(aq) + CN–(aq)
2.
3.
4.
5.
A.
HCN and CN–
B.
HCN and HPO42–
C.
H2PO4– and HPO42–
D.
HCN and H2PO4–
HCN(aq) + HPO42–(aq)
Which is not a conjugate acid-base pair?
–
A.
HNO3 and NO3
B.
CH3COOH and CH3COO
C.
+
H3O and H2O
D.
–
2–
H2SO4 and SO4
–
–3
Which 0.10 mol dm solution would have the highest conductivity?
A.
NH3
B.
HBr
C.
CH3COOH
D.
H2CO3
The pH of a solution changes from pH = 2 to pH = 5. What happens to the concentration of the hydrogen
ions during this pH change?
A.
It decreases by a factor of 1000
B.
It increases by a factor of 1000
C.
It decreases by a factor of 100
D.
It increases by a factor of 100
Which property is characteristic of acids in aqueous solution?
A.
Acids react with ammonia solution to produce hydrogen gas and a salt.
B.
Acids react with metal oxides to produce oxygen gas, a salt and water.
C.
Acids react with reactive metals to produce hydrogen gas and a salt.
D.
Acids react with metal carbonates to produce hydrogen gas, a salt and water.
6.
7.
A student has equal volumes of 1.0 mol dm
statement about the solutions is correct?
–3
sodium hydroxide and ammonia solutions.
Which
A.
Sodium hydroxide has a lower electrical conductivity than ammonia.
B.
Sodium hydroxide has a higher hydrogen ion concentration than ammonia.
C.
Sodium hydroxide has a lower pH than ammonia.
D.
Sodium hydroxide has a higher hydroxide ion concentration than ammonia.
Which of the following are pre-combustion methods to reduce sulfur oxide emissions?
I. Install catalytic converters, which converts the gases in cars into less harmful substances.
II. Clean the fuel by heating it with hydrogen and a catalyst to produce H 2S (hydrogen sulfide).
III. Convert petroleum power plants to solar or wind powered electrical stations.
8.
9.
10.
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
Which of the following are weak acids in aqueous solution?
I.
CH3COOH
II.
H2SO4
III.
H3PO4
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
What is the conjugate base of H2CO3 according to the Brønsted-Lowry theory?
2–
A.
CO3
B.
HCO3
C.
H3CO3
D.
CO2
–
+
What is the approximate pH of a 0.01 mol dm
A.
2
B.
More than 2 but less than 7
C.
More than 7 but less than 12
D.
12
–3
ammonia solution?
11.
12.
13.
14.
15.
When equal volumes of four 0.1 mol dm
first), what is the correct order?
–3
solutions are arranged in order of increasing pH (lowest pH
A.
CH3COOH < HNO3 < CH3CH2NH2 < KOH
B.
HNO3 < CH3COOH < CH3CH2NH2 < KOH
C.
CH3CH2NH2 < HNO3 < CH3COOH < KOH
D.
KOH < CH3CH2NH2 < CH3COOH < HNO3
–3
For equal volumes of 1.0 mol dm solutions of hydrochloric acid, HCl(aq), and methanoic acid,
HCOOH(aq), which statements are correct?
I.
HCl dissociates more than HCOOH
II.
HCl is a better electrical conductor than HCOOH
III.
HCl will neutralize more NaOH than HCOOH
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
Which list contains only strong acids?
A.
CH3COOH, H2CO3, H3PO4
B.
HCl, HNO3, H2CO3
C.
CH3COOH, HNO3, H2SO4
D.
HCl, HNO3, H2SO4
An example of a strong acid solution is perchloric acid, HClO 4, in water. Which statement is correct for
this solution?
A.
HClO4 is completely dissociated in the solution.
B.
HClO4 is partially dissociated in the solution.
C.
The solution reacts only with strong bases.
D.
The solution has a pH value greater than 7.
What is the formula of the conjugate base of the hydrogenphosphate ion, HPO 4
A.
H2PO4
B.
H3PO4
C.
HPO4
D.
PO4
–
3–
–
2–
?
16.
17.
Which pH value is that of an aqueous solution of carbon dioxide?
A.
2.1
B.
5.6
C.
9.8
D.
12.2
According to the Brønsted-Lowry theory, how does each species act in the equilibrium below?
+
–
CH3COOH + H2SO4  CH3COOH2 + HSO4
CH3COOH
H2SO4
A.
acid
base
base
acid
B.
acid
base
acid
base
C.
base
acid
base
acid
D.
base
acid
acid
base
18.
19.
20.
CH3COOH2
+
HSO4
–
Which species is amphiprotic?
A.
HSO4-
B.
H2SO4
C.
H3 O+
D.
NH3
Which substance, when dissolved in water, to give a 0.1 mol dm
A.
HCl
B.
NaCl
C.
NH3
D.
NaOH
–3
solution, has the highest pH?
Which methods will distinguish between equimolar solutions of a strong base and a strong acid?
I.
Add magnesium to each solution and look for the formation of gas bubbles.
II.
Add aqueous sodium hydroxide to each solution and measure the temperature change.
III.
Use each solution in a circuit with a battery and lamp and see how bright the lamp glows.
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
END of MULTIPLE CHOICE SECTION