How Much Will the pH Change When Adding Acid to a Buffered Solution?

[sunnyorange]

I need help:

A beaker with 200 of a 0.1M acetic acid buffer with a pH of 5.20 is sitting on a benchtop. A student adds 8.60 of a 0.380 solution to the beaker. How much will the pH change? The of acetic acid is 4.76.

 

[GCT]

you need to be more specific about the units and species involved.