a: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(n_{HCL}=\dfrac{10.95}{36.5}=0.3\left(mol\right)\)
\(n_{ZnCl_2}=n_{Zn}=\dfrac{13.6}{136}=0.1\left(mol\right)\)
Vì \(\dfrac{n_{Zn}}{1}< \dfrac{n_{HCl}}{2}\)
nên HCl dư
=>Tính theo mol của Zn
\(m_{Zn}=0.1\cdot65=6.5\left(g\right)\)
b: \(n_{H_2}=0.1\left(mol\right)\)
\(V_{H_2}=0.1\cdot22.4=2.24\left(lít\right)\)
a) \(n_{HCl}=\dfrac{10,95}{36,5}=0,3\left(mol\right)\)
\(n_{ZnCl_2}=\dfrac{13,6}{136}=0,1\left(mol\right)\)
PTHH : Zn + 2HCl -> ZnCl2 + H2
0,1 0,1
Xét tỉ lệ \(\dfrac{0,3}{2}>\dfrac{0,1}{1}\) => HCl dư , ZnCl2 đủ
\(m_{Zn}=0,1.65=6,5\left(g\right)\)
b. \(V_{Zn}=0,1.22,4=2,24\left(l\right)\)
