11 ml of 00100 m naoh are added to 250 ml of 00100 m acetic

Question

1) What mass (in grams) of potassium acetate, KC₂H₃O₂, must be added to 132 mL of 0.010 M acetic acid to form a buffer solution with a pH of 5.06?  

(K_a (HC₂H₃O₂)= 1.8 x 10^-5

2) 11 mL of 0.0100 M NaOH are added to 25.0 mL of 0.0100 M acetic acid. What is the pH of the resulting solution?

3) 14 mL of 0.010 M NaOH are added to 29 mL of water. Determine the pH of the resulting solution.

4) 12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC₂H₃O₂ and 0.09 M C₂H₃O₂^-.  What is the pH of the resulting solution?