Chapter 7 2020/2021

a) Determine the pH of 0.5 M ethanoic acid, CH3COOH, solution. [Given: Ka CH3COOH = 1.8 x10-5] 

[5 Marks]

b) In an experiment, 25 mL of 0.5 M CH3COOH was titrated against 0.5 M NaOH solution using phenolphthalein as indicator. The end point is reached when 25 mL of NaOH was added.

i. Determine the concentration of the product.    

[5 Marks] 

ii. Determine the pH of the solution at the end point.     

[4 Marks]