Hoá 8

C

computerscience

L

leductoanabc10

a) 2Al+3H2SO4----->Al2(SO4)3+3H2
b)
nH2=3,36/22,4=0,15mol
2Al+ 3H2SO4-----> Al2(SO4)3 + 3H2
0,1mol 0,15mol 0,05 0,15mol
mAl=0,1*27=2,7g
mH2SO4=0,15*98=14,7g
mddH2SO4=14,7*100/9,8=150g
mddSaupư=2,7+150-0,3=152,4g
m Al2(SO4)3 =0,05*342=17,1g
C%dd Al2(SO4)3 =17,1*100/152,4=11,2%
 
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