Buffer Solutions Worksheets Page 2
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1
2Buffers can also be made by partially neutralizing a weak acid with a strong
base, or a weak base with a strong acid.
4.
Which of the following mixtures result in a buffering solution when equal
volumes of the two solutions are mixed?
a)
0.1 M HCl and 0.1 M NH
Cl
4
b)
0.1 M HCl and 0.1 M NH
3
c)
0.2 M HCl and 0.1 M NH
3
d)
0.1 M HCl and 0.2 M NH
3
5.
What is the pH of a solution made by adding 0.40 g of NaOH to 100 ml of
a 0.4 M solution of CH
COOH? Is it a buffering solution?
3
6.
What volume of 2.0 M NaOH must be added to 100.0 mL of 2.5 M
-4
CHOOH (K
= 1.8 x 10
) to prepare a buffer with a pH of 4.0?
a
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