Experiment 5 Sample Quiz
1.
The titration is considered complete when the pH reaches?
7
1
14
12
2.
The approximate molarity of the phosphoric acid used in this experiment is:
0.02M
0.2M
2M
0.00002M
3.
In this experiment you will monitor the changes that occur in pH as you titrate:
a strong acid with a strong base.
a weak polyprotic acid with a weak base.
a strong acid with a weak base.
a weak polyprotic acid with a strong base.
4.
The image depicted in the introduction is for:
an idealized mono-prototic acid.
an idealized di-protic acid.
an idealized tri-protic acid.
citric acid.
phosphoric acid.
5.
The exact molarity of the phosphoric acid used in this experiment is:
2M
0.2M
0.02M
to be determined in the experiment.
6.
The procedure calls for plotting a graph of '_________' versus '______________" added.
'pH' Vs 'Volume of acid added'.
'pH' Vs 'Volume of base added'.
'[H
3
O
+
]' Vs 'Volume of base added'
'[H
3
O
+
]' Vs 'Volume of acid added'.
7.
How many Ka values do you expect to be able to determine for citric acid?:
1
2
5
4
3
8.
What is special about the [H
3
O
+
] at the 1/2 equivalence point in the titration of a weak mono-protic acid with a strong base?
[H
3
O
+
] = molarity of the acid
[H
3
O
+
] = K
a
[H
3
O
+
] = K
b
[H
3
O
+
] = [OH
-
]
9.
The procedure calls for the addition of __mL of acid to a small beaker?
10
20
100
50
10.
The initial buret reading corresponds to:
the volume of acid added.
the volume of base added.
0.00mL of acid added.
0.00mL of base added.
11.
The experiment calls for the use of which of the following indicators?
Phenolphthalein
No indicator is used in this experiment
Methyl-orange
Universal
12.
When the following reaction is balanced the coefficients in front of the reactants and products are:
H
2
X(aq) + NaOH = Na
2
X(aq) + H
2
O(l)
1,1,1,1
1,2,2,1
1,2,1,2
2,1,2,1
