设生成NaOHx克,H2y克
2Na+2H2o==2NaOH+H2
46 80 2
2.3 x=4g y=0.1g
17.8ml水=17.8g
溶质NaOH=4g
溶液=17.8+2.3-0.1=20g
溶质的质量分数=4/20*100%=20%
氢气=0.1/2mol=0.05*22.4=1.12L
设生成NaOHx克,H2y克
2Na+2H2o==2NaOH+H2
46 80 2
2.3 x=4g y=0.1g
17.8ml水=17.8g
溶质NaOH=4g
溶液=17.8+2.3-0.1=20g
溶质的质量分数=4/20*100%=20%
氢气=0.1/2mol=0.05*22.4=1.12L