pH Determination After Titration

6. What is the hydrogen ion concentration of a solution with a pH = 4.54?
a. 2.9 x 10^-19
b. 1.1 x 10^-2
c. 7.8 x 10^-5
d. 2.9 x 10^-5
e. 3.5 x 10^-10

16. What is the pH of a solution after titrating 25.0 mL of 0.500M HCOOH with 15.0 M of 0.500 M NaOH?
a. 8.78
b. 3.57
c. 3.91
d. 10.43
e. 5.22

17. What is the pH of a solution after 65.0 mL of 0.250 M HI is titrated with 25.0 mL 0.500 M NaOH?
a. 1.20
b. 2.08
c. 1.38
d. 12.80
e. 11.92

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