Zn + 2HCl => ZnCl2 + H2
nZn = m/M = 13/65 = 0.2 (mol)
Theo pthh ===> nH2 = 0.2 (mol)
==> VH2 = 22.4 x n = 0.2 x 22.4 = 4.48 (l)
CuO + H2 (đun nóng) ==> Cu + H2O
nCuO = m/M = 16/80 = 0.2 (mol)
LTS: 0.2/1 = 0.2/1 ==> pứ hết
a) \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b) \(n_{Zn}=\frac{13}{65}=0,2\left(mol\right)\)
Theo PTHH: \(n_{H_2}:n_{Zn}=1:1\)
\(\Rightarrow n_{H_2}=n_{Zn}=0,2\left(mol\right)\)
\(\Rightarrow V_{H_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\)