Slide 1 / 48
1
According to the Arrhenius concept, an acid is a
substance that __________.
A
is capable of donating one or more H+
B
causes an increase in the concentration of H+ in
aqueous solutions
C
can accept a pair of electrons to form a
coordinate covalent bond
D
reacts with the solvent to form the cation
formed by autoionization of that solvent
E
tastes bitter
Slide 2 / 48
2
A Bronsted-Lowry base is defined as a substance
that __________.
A
increases [H+] when placed in H2O
B
decreases [H+] when placed in H2O
C
increases [OH-] when placed in H2O
D
acts as a proton acceptor
E
acts as a proton donor
Slide 3 / 48
3
A Bronsted-Lowry acid is defined as a substance
that __________.
A
increases Ka when placed in H2O
B
decreases [H+] when placed in H2O
C
increases [OH-]
D
acts as a proton acceptor
E
acts as a proton donor
when placed in H2O
Slide 4 / 48
4
A substance that is capable of acting as both an
acid and as a base is __________.
A
autosomal
B
conjugated
C
amphoteric
D
saturated
E
miscible
Slide 5 / 48
5
What is the conjugate acid of NH3?
A
NH3
B
NH2+
C
NH3+
D
NH4+
E
NH4OH
Slide 6 / 48
6
The conjugate base of HSO4 - is __________.
A
OH-
B
H2SO4
C
SO4 2-
D
HSO4+
E
H3SO4+
Slide 7 / 48
7
The conjugate acid of HSO4 - is __________.
A
H+
B
H2SO4
C
SO4 2-
D
HSO4+
E
HSO3+
Slide 8 / 48
8
What is the conjugate base of OH-?
A
O2
B
O-
C
H 2O
D
O2-
E
H 3O +
Slide 9 / 48
9
Which one of the following is a Bronsted-Lowry
acid?
A
(CH3)3NH+
B
CH3COOH
C
HF
D
HNO2
E
all of the above
Slide 10 / 48
10 Which of the following compounds could never
act as an acid?
A
SO42-
B
HSO4 -
C
H2SO4
D
NH3
E
CH3COOH
Slide 11 / 48
11 What is an acid, according to Bronsted-Lowry?
A
anything that donates hydrogen atoms
B
anything that donates hydrogen ions
C
anything that accepts hydrogen ions
D
anything that dissolves metal
E
anything that donates hydronium ions
Slide 12 / 48
12 What is a base, according to Bronsted-Lowry?
A
anything that accepts hydrogen ions
B
anything that accepts hydroxide ions
C
anything that donates hydroxide ions
D
anything that can be used to clean drains
E
anything with a bitter taste
Slide 13 / 48
13 According to the following reaction, which molecule
is acting as an acid?
H2O + H2SO4 → H3O+ + HSO4-
A
H2SO4
B
H 2O
C
H 3O +
D
HSO4-
E
None of the above
Slide 14 / 48
14 According to the following reaction, which molecule
is acting as base?
H2O + H2SO4 → H3O+ + HSO4-
A
H2SO4
B
H 2O
C
H 3O +
D
HSO4-
E
None of the above
Slide 15 / 48
15 According to the following reaction, which molecule
is acting as an acid?
H3O+ + HSO4- → H2O + H2SO4
A
H2SO4
B
H 2O
C
H 3O +
D
HSO4-
E
None of the above
Slide 16 / 48
16 According to the following reaction, which molecule
is acting as a base?
H3O+ + HSO4- → H2O + H2SO4
A
H2SO4
B
H 20
C
H 3O +
D
HSO4-
E
None of the above
Slide 17 / 48
17 According to the following reaction, which molecule
is acting as a base?
H2O + NH3 → OH- + NH4+
A
H 2O
B
NH3
C
OH-
D
NH4+
E
None of the above
Slide 18 / 48
18 According to the following reaction, which molecule
is acting as an acid?
H2O + NH3 → OH- + NH4+
A
H 2O
B
NH3
C
OH-
D
NH4+
E
None of the above
Slide 19 / 48
19 According to the following reaction, which molecule is
acting as an acid?
OH- + NH4+ → H2O + NH3
A
H 2O
B
NH3
C
OH-
D
NH4+
E
None of the above
Slide 20 / 48
20 According to the following reaction, which molecule
is acting as a base?
OH- + NH4+ → H2O + NH3
A
H 2O
B
NH3
C
OH-
D
NH4+
E
None of the above
Slide 21 / 48
21 In the below reaction, what does the double arrow
symbol “↔” mean?
OH- + NH4+ ↔ H2O + NH3
A
The forward and backwards reactions are
happening at the same time
B
The reaction can’t decide which way to go
C
The forward reaction does not progress
D
The backward reaction happens as fast as the
forward reaction so the proton is not transferred
E
None of the above
Slide 22 / 48
22 For the following reaction, identify whether the
compound in bold is behaving as an acid or a base.
H3PO4 + H2O <--> H2PO4- + H3O+
A
Acid
B
Base
C
Neither
D
Both
E
None of the above
Slide 23 / 48
23 For the following reaction, identify whether the
compound in bold is behaving as an acid or a base.
H3PO4 + H2O <--> H2PO4- + H3O+
A
Acid
B
Base
C
Neither
D
Both
E
None of the above
Slide 24 / 48
24 For the following reaction, identify whether the
compound in bold is behaving as an acid or a base.
H3PO4 + H2O ↔ H2PO4- + H3O+
A
Acid
B
Base
C
Neither
D
Both
E
None of the above
Slide 25 / 48
25 For the following reaction, identify whether the
compound in bold is behaving as an acid or a base.
H3PO4 + H2O ↔ H2PO4- + H3O+
A
Acid
B
Base
C
Neither
D
Both
E
None of the above
Slide 26 / 48
26 A substance that is capable of acting as both an
acid and as a base is __________.
A
autosomal
B
conjugated
C
amphoteric
D
saturated
E
miscible
Slide 27 / 48
27 The molar concentration of hydronium ion in pure
water at 25 °C is __________.
A
0.00
B
1.0x10-7
C
1.0x10-14
D
1.00
E
7.00
Slide 28 / 48
28 The molar concentration of hydroxide ion in pure
water at 25 °C is __________.
A
1.00
B
0.00
C
1.0x10-14
D
1.0x10-7
E
7.00
Slide 29 / 48
29 The magnitude of Kw indicates that __________.
A
water autoionizes very slowly
B
water autoionizes very quickly
C
water autoionizes only to a very small extent
D
the autoionization of water is exothermic
Slide 30 / 48
30 In basic solution, __________.
A
[H3O+] = [OH-]
B
H3O+] > [OH-]
C
[H3O+] < [OH-]
D
[H3O+] = 0M
E
[OH-] >7.0
Slide 31 / 48
31 An aqueous solution contains 0.10 M NaOH. The
solution is __________.
A
very dilute
B
highly colored
C
basic
D
neutral
E
acidic
Slide 32 / 48
32 Nitric acid is a strong acid. This means that
__________.
A
aqueous solutions of HNO3 contain equal
concentrations of H+ (aq) and OH- (aq)
B
HNO3 does not dissociate at all when it is dissolved
in water
C
HNO3 dissociates completely to H+ (aq) and NO3(aq) when it dissolves in water
D
HNO3 produces a gaseous product when it is
neutralized
E
HNO3 cannot be neutralized by a weak base
Slide 33 / 48
33 Which of the following solutions is the most
acidic?
A
a solution with pH = 3
B
a solution with pH = 5
C
a solution with pH = 7
D
a solution with pH = 10
E
all of the solutions are basic
Slide 34 / 48
34 If you had a 1.0 M solution of a strong acid, what
would be a reasonable pH?
A
1
B
6
C
7
D
8
E
13
Slide 35 / 48
35 If you had a 1.0 M solution of a weak acid, what
would be a reasonable pH?
A
1
B
6
C
7
D
8
E
13
Slide 36 / 48
36 If you had a 1.0 M solution of a weak base, what
would be a reasonable pH?
A
1
B
6
C
7
D
8
E
13
Slide 37 / 48
37 If you had a 1.0 M solution of a strong base, what
would be a reasonable pH?
A
1
B
6
C
7
D
8
E
13
Slide 38 / 48
38 Which solution below has the highest
concentration of hydroxide ions?
A
pH = 3.21
B
pH = 12.6
C
pH = 7.93
D
pH = 9.82
E
pH = 7.00
Slide 39 / 48
39 As the pH increases, the hydroxide ion
concentration __________.
A
decreases
B
increases
C
starts to affect the [H+]
D
stays constant
Slide 40 / 48
40 If the pH of a solution is 10, what is the hydronium
ion concentration?
A
4
B
10
C
1 x 10-4
D
1 x 10-7
E
1 x 10-10
Slide 41 / 48
41 If the pH of a solution was 7 and you were to
increase the hydroxide ion concentration, what
would the pH be?
A
1
B
5
C
7
D
9
E
1 x 10-5
Slide 42 / 48
42 If the pH of a solution was 7 and you were to
increase the hydronium ion concentration 1000x,
what would the pH be?
A
4
B
7
C
143
D
7000
E
1 x 10-4
Slide 43 / 48
43 An aqueous solution at 25.0 °C contains [H+] =
0.099M. What is the pH of the solution?
A
1.00
B
-1.00
C
13.0
D
0.0990
E
1.00x10-13
Slide 44 / 48
44 The pH of an aqueous solution at 25.0 °C is 10.66.
What is the molarity of in this solution?
A
2.2x10-11
B
4.6 x10-4
C
3.3
D
1.1x10-13
E
4.6x1010
Slide 45 / 48
45 What is the pH of an aqueous solution at 25.0 °C in
which [H]+ is 0.0025 M?
A
3.40
B
2.60
C
-2.60
D
-3.40
E
2.25
Slide 46 / 48
46 What is the pH of an aqueous solution at 25.0 °C that
contains 3.98x10-9 M hydronium ion?
A
8.400
B
5.600
C
9.000
D
3.980
E
7.000
Slide 47 / 48
47 What is the concentration (in M) of hydronium ions
in a solution at 25.0 °C with pH = 4.282?
A
4.28
B
9.71
C
1.92x10-10
D
5.22x10-5
E
1.66x104
Slide 48 / 48