Zn +2HCl---->ZnCl2 +H2
a) Ta có
n\(_{H2}=\frac{2,24}{22,4}=0,1\left(mol\right)\)
Theo pthh
n\(_{Zn}=n_{H2}=0,1\left(mol\right)\)
m\(_{Zn}=0,1.65=6,5\left(g\right)\)
n\(_{ZnCl2}=0,1.136=13,6\left(g\right)\)
b) Theo pthh
n\(_{HCl}=2n_{H2}=0,2\left(mol\right)\)
C\(_{M\left(HCl\right)}=\frac{0,2}{0,025}=8\left(M\right)\)
Zn + 2HCl = ZnCl2 + H2
0,1.....0,2......0,1.........0,1
nH2=0,1 mol
=> nZnCl2=0,1 mol
=> mZnCl2=13,6 g
nHCl =0,2 mol
=> Cm(HCl) =0,2:0,025=8M