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WorksheetsAcids and Bases for AP
Total questions: 20
Worksheet time: 21mins
True or False? The stronger the acid, the larger the value of the Ka.
True
False
Select ALL of the strong acids.
HClO4
HNO2
HF
HI
HNO3
What is the conjugate acid of HCO31-?
CO3
H2CO3
CO32-
H2CO32-
Estimate the pH of a 1.5 x 10-8 M solution of HCl.
5.85
7.85
8.15
9.5
Estimate the pH of a barium hydroxide solution with a concentration of 2.5 x 10-2 M. Assume complete dissociation.
12.5
1.75
1.5
8.5
Estimate the pKa for an acid, HA, if its Ka is 4.5 x 10-11 M.
11.45
4.5
10.55
15.5
If a weak acid, HA, has a Ka = 2.9 x 10-5, what is the Kb for its conjugate base, A-?
3.8 x 10-8
3.4 x 10-10
1.4 x 10-7
1.4 x 10-9
Which two species would be identified as Bronsted-Lowry bases?
HF and F-
NH3 and F-
NH3 and NH4+
NH4+ and F-
Which of these "HOY" acids is the weakest?
HOCl
HOI
HOBr
All of these are equally strong.
Which of these is the strongest Bronsted base?
F-
Cl-
Br-
I-
Which of these would have the lowest pKa? (Assume the species are numbered 1 to 4 going left to right.)
Species 1 (far left)
Species 2 (second from left)
Species 3 (third from left)
Species 4 (far right)
Which of these substances is the most basic?
bleach
tomato juice
baking soda
milk
What is the pH of 0.45 M HCN if it has a pKa of 9.21?
4.8
3.1
5.8
1.7
What is the conjugate base of HClO4?
H+
Cl-
ClO3-
ClO4-
Which is a strong acid?
12.0M HNO2
10.0M H2SO3
5.0M HI
5.0M HF
The [OH-] = 4.0 x 10-9, what is the pH of the solution?
9.0
5.6
8.3
4.3
Which acid produces the strongest conjugate base?
HClO4 (Ka= 1.0 x 107)
HCN (Ka= 4.0 x 10-10)
H3PO4 (Ka= 7.5 x 10-3)
H2CO3 (Ka = 4.2 x 10-7)
Which represents an acid with the smallest Ka value?
HX
HY
HZ
Which acid would have the smallest pH value?
HX
HY
HZ
Which of these is the strongest acid?
Hypochlorous acid
Chlorous acid
Chloric acid
Perchloric acid
