[clepzz]

Okay, I have two questions. Please *delete me* Thank you.

1) What is the ratio of acetate ion to acetic acid (Ka = 1.76 x 10^-5) in a buffer containing these compounds at pH = 3.030?

Ka = 1.76 x 10^-5
pH = 3.030

2) Calculate the pH of a buffer that is 0.276M acetic acid and 0.118M of sodium acetate. The Ka of acetic acid is 1.76 x 10^-5 at 25 degrees C. What is the pH of the mixture at 0 degrees C? (At 0 degrees C, Ka = 1.64 x 10 ^-5)

Answer:
pH at 25 degrees C = ?
pH at 0 degrees C = ?

[Hunter2]

Use the equation of Henderson-Hasselbalch.

http://en.wikipedia.org/wiki/Henderson%E2%80%93Hasselbalch_equation

PS: What does this mean?

Please *delete me* Thank you.