n(NaOH)=m(NaOH)/Mr(NaOH)=24.0g/40g.mol-1=0.6mol
c(NaOH)=n(NaOH)/V=0.6mol/1L=0.6 mol/L
2)设生成标准状况下的H2的物质的量为Xmol,由题意得
2Al+2NaOH+2H2O=2NaAlO2+3H2↑
2 3
0.2Lx0.6mol/L X
X=0.2x0.6x3/2=0.18mol
V(H2)=0.18x22.4=4.03L
n(NaOH)=m(NaOH)/Mr(NaOH)=24.0g/40g.mol-1=0.6mol
c(NaOH)=n(NaOH)/V=0.6mol/1L=0.6 mol/L
2)设生成标准状况下的H2的物质的量为Xmol,由题意得
2Al+2NaOH+2H2O=2NaAlO2+3H2↑
2 3
0.2Lx0.6mol/L X
X=0.2x0.6x3/2=0.18mol
V(H2)=0.18x22.4=4.03L