PTHH:Fe+H2SO4->FeSO4+H2
Zn+H2SO4->ZnSO4+H2
2Al+3H2SO4->Al2(SO4)3+3H2
m\(_{H2SO4}\)=\(\frac{490.10\%}{100\%}\)=49(g)
m\(_{H2SO4}\)=\(\frac{49}{98}\)=0,5(mol)
theo pt :n\(_{H2SO4}\)=n\(_{H2}\)=0,5(mol)
ADĐLPT khối lg
m\(_{kl}\)+m\(_{H2SO4}\)=m\(_M\)+m\(_{H2}\)
=>mM=17,5+49-0,5.1=65,5(g)