Question

Which of the following could be used to formulate 100 mls of a 0.10 M acetate buffer (pK=4.76) at pH 5 if you start with 64 mls of 0.10 M sodium acetate?

34 mls of 0.10 M HCl


3.6 mls of 1 M NaOH


3.6 mls of 1 M HCl


34 mls of 0.10 M NaOH


34 mls of 0.10 M acetic acid

Answer 1

Lets think..... What is sodium acetate? A base or acid?

Its a base.

If you want to make a buffer, just add the opposite.

Here is a hint: You start with 64 ml of base......how much more do you need to make 100 ml?

Goodluck.