Buffer help.

Would appreciate some assistance from some chem gurus :smile:

Trying to make the calculations necessary to prepare 0.1 M Tris-HCl buffer. I have 80mL of a 0.1 M tris solution and need to find the volume of 1 N HCl required to adjust the pH of Tris to 8.0. I believe I need to use the Henderson-Hasselbach equation but not sure how to set it up.

Thank you!
 

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