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3. 58 A 25.0-mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution. What is the pH after 13.3 mL of base is added?

3. 58 A 25.0-mL sample of 0.150 M hydrazoic acid is titrated with a 0.150
M NaOH solution. What is the pH after 13.3 mL of base is added? The
Ka of hydrazoic acid is 1.9x10-5.
a. 4.45
b. 1.34
c. 3.03
d. 4.78
e. 4.66

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