a.Zn + 2HCl -----> ZnCl2 + H2
nZn=67,2/65=1,034(mol)
=>nH2=1,034(mol)=>VH2=1,034*22,4=23,16(l)
b.Fe+2HCl->FeCl2+H2
nFe=25,2/56=0,45(mol)=>nHCl=0,45*2=0,9(mol)
=>mHCl=0,9*36,5=32,85(g)
nH2=0,45(mol)=>VH2=0,45*22,4=10,08(l)
b..Zn + 2HCl -----> ZnCl2 + H2
mHCl=0,1034*2=0,2068(mol)=>mHCl=0,2068*36,5=7,5482(g)
mHCl cần=\(\dfrac{26,88\cdot7,5482}{23,16}=8,76\left(g\right)\)
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