2Na + 2H2O = 2NaOH + H2↑
2Al + 2NaOH + 2H2O = 2NaAlO2 + 3H2↑
8.96L=0.25mol
列比例解得:NA=4.6g,Al=5.3g
c=0.2mol/0.2L=1mol/L
23n(Na)+27n(Al)=10
n(Na)+3n(Al)=8.96/11.2
4.6 5.4 1mol/L
2Na + 2H2O = 2NaOH + H2↑
2Al + 2NaOH + 2H2O = 2NaAlO2 + 3H2↑
(1)设钠和铝各为xmol,ymol
所以23X+27Y=10
1/2X+3/2Y=8.96/22.4
X=0.2mol Y=0.2mol
mNa=4.6g mAl=5.4g
(2)因为恰好反映所以溶质为n NaAlO2=nNa=0.2mol
c=0.2mol/0.2L=1mol/L