What is the pH of a buffer made by combining 175 mL of 0.33 M NaC2H3O2 with 126 mL of 0.48 M HC2H3O2? The Ka of acetic acid is 1.75 × 10-5.
a. 4.74
b. 4.78
c. 5.79
d. 4.69
e. 5.24
Answer: A
What is the pH of a buffer made by combining 175 mL of 0.33 M NaC2H3O2 with 126 mL of 0.48 M HC2H3O2? The Ka of acetic acid is 1.75 × 10-5.
a. 4.74
b. 4.78
c. 5.79
d. 4.69
e. 5.24
Answer: A