Homework Answers
1)
CH3COOH and CH3COONa fom the acidic buffer system .
pH = pKa + log [CH3COONa ]/ [ CH3COOH]
when the acid is added , thenumber of moles of CH3COOH increases and thenumber of moles of the salt decreases.
CH3COONa
+ HCl 
CH3COOH + NaCl
when the base isadded the number of moles of the salt(CH3COONa)increases and the number of moles of the acid (CH3COOH)decreases.
CH3COOH
+ NaOH 
CH3COONa +
H2O
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