Acids And Bases Worksheet - Michalek, Unit 14 Page 9
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27AP Chemsitry--Michalek
9
Unit 14 Acids and Bases
Example
-8
Calculate the pH of hypochlorous acid if the K
= 3.5 x 10
?
a
The pH of a Mixture of Weak Acids
Example
-10
-4
Calculate the pH of a solution that contains 1.00M HCN (K
= 6.2 x 10
) and 5.00 M HNO
(K
= 4.0 x 10
). Also calculate
a
2
a
the concentration of cyanide ion in this solution at equilibrium.
Percent Dissociation
Percent dissociation = amount dissociated
x 100
Initial concentration
-2
A 1.00M HF solution breaks up to contain 2.7 x 10
M of hydrogen ions. What is the percent dissociation?
-2
2.7 x 10
x 100 = 2.7%
1.00
Example
-5
Calculate the percent dissociation of acetic acid (K
= 1.8 x 10
) in each of the following solutions. a. 1.00 M acetic acid
a
b. 0.100 M acetic acid
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