7 determine the molarity of the naoh solution 8

7) Determine the molarity of the NaOH solution.
8) Dilute the 6 M acetic acid to make 150 mL of approximately 0.10 M acetic acid.
9) Use a volumetric pipette to transfer 10 mL of acetic acid to a flask to be titrated (three
different samples).
10) Fill the burette with the NaOH solution.
11) Carefully add NaOH solution to the acetic acid until it changes colour.
12) Determine the average molarity of the acetic acid solutions.
13) Add 20 mL of acetic acid to a 50 mL beaker.
14) Plug the pH meter into Microlab.
15) Place the pH meter into the acetic acid solution and read the value given on Microlab.

16) Very gently rinse the pH meter by squirting it with water from the squirt bottle.
17) Determine the concentration of hydronium ions.
18) Determine the experimental values of pK
a
of acetic acid.
19) Calculate the mass of sodium acetate needed to make 100 mL of solution of the same
molarity as the acetic acid solution.
20) Mix the solid sodium acetate with water and stir.
21) Mix 50 mL of sodium acetate and 50 mL of acetic acid solution.
22) Pour about 20 mL of the solution into a 50 mL beaker.