СH3-COOH + NaOH = CH3-COONa + H2O m(CH3COONa)=30/100х500=150 г M(CH3COONa)=82 г/моль n(CH3COONa)=150/82=1,83 моль n(CH3COOH)=n(CH3COONa)=1,83 моль M(CH3COOH)= 60 г/моль m(CH3COOH)=60х1,83=110 г w(CH3COOH)=10%/100%=0,1 m(р-ра)=110/0,1=1100 г