Buffers
Example:
Instructions for making up a buffer say to mix 60. mL (0.060 L) of 0.100 M $NH_3$ with 40. mL (0.040 L) of
0.100 M $NH_4Cl$. What is the pH of this buffer?
Example:
Calculate the pH of 75 mL of the buffer solution prepared from 0.10 M acetic acid, $HC_2H_3O_2$, and 0.20 M sodium
acetate, $NaC_2H_3O_2$ to which 9.5 mL of 0.10 M hydrochloric acid is added. Compare the pH change with what
would occur if this amount of acid were added to pure water.