Zn +2HCl----> ZnCl +H2
a) Ta có
n\(_{Zn}=\frac{8,125}{65}=0,125\left(mol\right)\)
n\(_{HCl}=\)\(\frac{18,25}{36,5}=0,5\left(mol\right)\)
=> HCl dư
Theo pthh
n\(_{ZnCl2}=n_{ }\)=0,125(mol)
m\(_{ZnCl2}=0,125.136=17\left(g\right)\)
b)Theo pthh
n\(_{H2}=n_{Zn}-0,125\left(mol\right)\)
V\(_{HA}=0,125.22,4=2,8\left(l\right)\)
Chúc bn học tốt
Zn + 2HCl -> ZnCl2 + H2
nZn=0,125(mol)
nHCl=0,5(mol)
Vì 0,125.2<0,5 nên HCl dư
Theo PTHH ta có:
nZn=nZnCl2=nH2=0,125(mol)
mZnCl2=136.0,125=17(g)
VH2=22,4.0,125=2,8(g)
Zn + 2HCl -> ZnCl2 + H2
nZn=0,125(mol)
nHCl=0,5(mol)
Vì 0,125.2<0,5 nên HCl dư
Theo PTHH ta có:
nZn=nZnCl2=nH2=0,125(mol)
mZnCl2=136.0,125=17(g)
VH2=22,4.0,125=2,8(g)