H2的物質(zhì)的量是n=V/Vm=1.12/22.4=0.05mol
2Na+2H2O=2NaOH+H2↑
2 2 1
x y 0.05mol
x=0.1mol
y=0.1mol
Na的質(zhì)量是m=nM=0.1*23=2.3g
Na2O的質(zhì)量是5.4-2.3=3.1
Na2O的物質(zhì)的量是n=m/M=3.1/62=0.05mol
Na2O+H2O=2NaOH
1 2
0.05mol z
z=0.1mol
生成NaOH的總物質(zhì)的量是0.1+0.1=0.2mol,質(zhì)量是m=nM=0.2*40=8g
H2的質(zhì)量是m=nM=0.05*2=0.1g
反應(yīng)后溶液的質(zhì)量是5.4+40-0.1=45.3g,溶液的質(zhì)量分?jǐn)?shù)是8/45.3*100%=17.7%
答：原混合物中鈉的質(zhì)量是2.3g,氧化鈉的質(zhì)量是3.1g,NaOH溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)是17.7%我來(lái)幫他解答