Using Henderson Hasselbalch Equation on the Final

[Glenda Marshall DIS 3M]

I 've been told in many review sessions that it is okay to use the Henderson Hasselbalch Equation in a titration when the reaction is in the buffer region. For example:

Suppose that 25mL of .10M CH3COOH is titrated with .10M NaOH. What is the pH after the addition of 10mL of .10M NaOH?

After finding the change in moles of the acid and conjugate base due to the NaOH and finding the new molarities, can I use the HH equation to solve for the pH since it is in the buffer zone? Or will that not be allowed on the final. Thank you!

[Vera Khurshudyan 1K]

I am pretty sure that the HH equation will be allowed because that is the way they explain it in the book.

[Chem_Mod]

The H.H. equation is a very good approximation of the pH in the 'buffer' region.

I dont see any reason you would not be 'allowed' to use it on the Final. What makes you think you cannot use it on the final exam.