是NaOH和NaAlO2两种物质,N(Na)=0.050*2+0.27/27=0.11(mol)
Na+Al+2H2O==NaAlO2+2H2,N(Na)=0.5n(H2)=0.025mol
Na2O(0.11-0.025)/2=0.0425mol
钠质量分数=23*0.11/(0.025*23+0.0425*62)=0.788=78.8%
是NaOH和NaAlO2两种物质,N(Na)=0.050*2+0.27/27=0.11(mol)
Na+Al+2H2O==NaAlO2+2H2,N(Na)=0.5n(H2)=0.025mol
Na2O(0.11-0.025)/2=0.0425mol
钠质量分数=23*0.11/(0.025*23+0.0425*62)=0.788=78.8%