Theo gt ta có: $n_{Zn}=0,06(mol)$
$Zn+2HCl\rightarrow ZnCl_2+H_2$
a, Ta có: $n_{HCl}=0,12(mol)\Rightarrow m_{ddHCl}=30(g)$
b, Ta có: $n_{H_2}=0,06(mol)\Rightarrow V_{H_2}=1,344(l)$
a)
n Zn = 3,9.65 = 0,06(mol)
Zn + 2HCl $\to$ ZnCl2 + H2
Theo PTHH :
n HCl = 2n Zn =0,12(mol)
=> mdd HCl = 0,12.36,5/14,6% = 30(gam)
n H2 = n Zn = 0,06(mol)
V H2 = 0,06.22,4 = 1,344 lít
nZn=0,06(mol)nZn=0,06(mol)
Zn+2HCl→ZnCl2+H2Zn+2HCl→ZnCl2+H2
a, Ta có: nHCl=0,12(mol)⇒mddHCl=30(g)nHCl=0,12(mol)⇒mddHCl=30(g)
b, Ta có: nH2=0,06(mol)⇒VH2=1,344(l)