PTHH: Zn + 2HCl => ZnCl2 + H2
=> nHCl =2nZn= 6,3/65 .2=63/325 (mol)
=> V= (63/325)/2 = 63/650 \(\approx\) 0,1 lít
=> nH2=nZn=6,3/65 (mol)
=> VH2=22,4.(6,3/65) xấp xỉ 2,17 lít
=> nZnCl2 =nZn=6,3/65 (mol)
=> m ZnCl2 = (65+35,5.2)(6,3/65) \(\approx\)13,18 g
PTHH: Zn + 2HCl => ZnCl2 + H2
0,09---0,18------0,09---------0,09
nZn=6,3\65=0,09 mol
=>V HCl=0,09l
=>VH2=0,09.22,4=2,016l
=>mZnCl2=0,09.136=12,24g
a) PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b) Ta có: \(n_{Zn}=\frac{6,3}{65}=\frac{63}{650}\left(mol\right)\) \(\Rightarrow n_{HCl}=\frac{63}{650}\cdot2=\frac{63}{325}\left(mol\right)\)
\(\Rightarrow V_{HCl}=\frac{2}{\frac{63}{325}}\approx10,3\left(l\right)\)
c) Theo PTHH: \(n_{Zn}=n_{H_2}=\frac{63}{650}\left(mol\right)\) \(\Rightarrow V_{H_2}=22,4\cdot\frac{63}{650}\approx2,2\left(l\right)\)
d) Theo PTHH: \(n_{Zn}=n_{ZnCl_2}=\frac{63}{650}\left(mol\right)\)
\(\Rightarrow m_{ZnCl_2}=\frac{63}{650}\cdot136\approx13,2\left(g\right)\)