NH2CH2COOH+NaOH=NH2CH2COONa+H2O m(NH2CH2COOH)=150*0.05=7.5 n(NH2CH2COOH)=7.5/75=0.1 n(NH2CH2COOH)=n(NH2CH2COONa)=n(H2O) m(NH2CH2COONa)=0.1*97=9.7 m(H2O)=0.1*18=1.8 m(NaOH)=9.7+1.8-7.5=4