Would you use Hernderdssson hasselback equation for these?

1. What is the pH of a 50 mL of buffer that is 0.150 M in lactic acid (HC3H5O3) and 0.100 M in sodium lactate (NaC3H5O3)? Ka = 1.4 x 10-4

2. What is the pH of this solution after 0.001 moles of HCl is added?

Question

Would you use Hernderdssson hasselback equation for these?

1.	 What is the pH of a 50 mL of buffer that is 0.150 M in lactic acid (HC3H5O3) and 0.100 M in sodium lactate (NaC3H5O3)?  Ka = 1.4 x 10-4





2.	 What is the pH of this solution after 0.001 moles of HCl is added?

aaronq · Answer

yes

anonymous · Answer

1. yes

2. Not in careful work, because you will have consumed 20% of the base.

anonymous · Answer

Ok thank you. So I figured out the first one. It's just pKa+log(base/acid), but now I'm a little lost on the second question. Do I need to set up an ICE table?