\(n_{CH3COOH}=\frac{12}{60}=0,2\left(mol\right)\)
Đổi : 200ml = 0,2l ; 100ml = 0,1l
\(n_{NaOH}=0,2.0,2=0,04\left(mol\right)\)
\(PTHH:CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\)
Ban đầu : ___0,2_________0,04________________
Phứng : _____0,04______0,04____________________
Sau :_________0,16_____0_________0,04___________
\(CM_{CH3COOH\left(bđ\right)}=\frac{0,2}{0,1}=2M\)
\(CM_{CH3COOH\left(dư\right)}=\frac{0,16}{0,3}=\frac{8}{15}M\)
\(CM_{CH3COONa}=\frac{0,04}{0,3}=\frac{2}{15}M\)