2Al+3H2SO4->Al2(SO4)3+3H2(khí)
mH2SO4=100*9.8:100=9.8(g)
nH2SO4=0.1(mol)
theo pthh:nAl=2/3 nH2SO4->nAl=2/3*0.1=0.07(mol)
mAl=0.07*27=1.89(g)
theo pthh:nH2=nH2SO4->nH2=0.1(mol)
VH2=0.1*22.4=2.24(l)
Theo pthh:nAl2(SO4)3=1/3 nH2SO4->nAl2(SO4)3=0.03(mol)
m muối=0.03*342=10.26(g)
mdd=1.89+100-0.1*2=101.69(g)
C% muối:10.26:101.69*100=10.09%