PTHH
FE +H2SO4 ➝ FESO4 +H2 (1)
2Al + 6HCl ➝ 2AlCl3 + H2 (2)
Theo bài ta có :
nFe = \(\dfrac{a}{56}\) mol
nAl = \(\dfrac{b}{27}\) mol
⇒nH2(pt1) = nFe = \(\dfrac{a}{56}\) mol
⇒nH2(pt2)= \(\dfrac{3}{2}nAl\)= \(\dfrac{3}{2}.\dfrac{b}{27}\)= \(\dfrac{b}{18}mol\)
Ta lại có :
nH2(pt1) = nH2(pt2)
⇒\(\dfrac{a}{56}=\dfrac{b}{18}\)<=>18a=56b=>\(\dfrac{a}{b}=\dfrac{18}{56}=\dfrac{9}{28}\)
tick mik nhé ~