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WorksheetsAcid Base Part B Review
Total questions: 10
Worksheet time: 20mins
Name
Class
Date
1.
When citric acid is produced by the cells of an orange and dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as a
a)
concentrated acid.
b)
strong acid.
c)
dilute acid.
d)
weak acid.
2.
The graph plotted belongs to a titration between
a)
CH3COOH(aq) with NaOH(aq)
b)
HCl(aq) with NaOH(aq)
c)
NH3(aq) with HCl(aq)
d)
H2S(aq) with NaOH(aq)
3.
Which of the following equimolar solutions could act as a buffer system?
a)
ClO-(aq) / HClO4(aq)
b)
H2PO4-(aq) / H3PO4(aq)
c)
Cl-(aq) / HCl(aq)
d)
NO3- / HNO3(aq)
4.
Using the options given, select the correct equilibrium equation and colour of the solution if a few drops of bromothymol blue are added to a solution of nitrous acid:
a)
A
b)
B
c)
C
d)
D
5.
The Brønsted-Lowry bases in the equation below are:
HCO3-(aq) + HSO4- ↔ H2CO3(aq) + SO42-(aq)
HCO3-(aq) + HSO4- ↔ H2CO3(aq) + SO42-(aq)
a)
HCO3-(aq) and SO42-(aq)
b)
HSO4- and SO42-(aq)
c)
H2CO3(aq) and HSO4-
d)
H2CO3(aq) and SO42-
6.
A technician has been given two unlabelled basic solutions. One is a weak base & one is a strong base but they have the same pH. Which of the following statements is true?
a)
The weak base dissociates 100% and is more concentrated than the strong base.
b)
The strong base dissociates less than 100% and is more concentrated than the weak base.
c)
The weak base dissociates less than 100% and is less concentrated than the strong base.
d)
The strong base dissociates 100% and is less concentrated than the weak base.
7.
Indicators are added to three samples of acid rain from the same source. The samples with methyl orange and chlorophenol red are yellow. The sample with methyl red is red. The approximate pH of the rain sample is
a)
3.0
b)
4.6
c)
5.0
d)
5.5
8.
If the [H3O+(aq)] of a sample of acid rain was determined to be 2.0 x 10-5 mol/L, then the pH and pOH are, respectively,
a)
4.05 and 9.95
b)
4.40 and 9.60
c)
4.70 and 9.30
d)
5.00 and 9.00
9.
The Bronsted-Lowry equation for the reaction which takes place in the region between I and II is
a)
H2PO4−(aq) + OH−(aq) ↔ HPO42−(aq) + H2O(l)
b)
H3PO4(aq) + OH−(aq) ↔ H2PO4−(aq) + H2O(l)
c)
HPO42−(aq) + OH−(aq) ↔ PO43−(aq) + H2O(l)
d)
H3PO4(aq) + 2 OH−(aq) ↔ HPO42−(aq) + 2 H2O(l)
10.
On this graph the equivalence point is represented by ____ and the buffering region is represented by ____.
a)
II and I
b)
II and IV
c)
III and I
d)
III and IV
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