\(a.PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(b.n_{Zn}=\dfrac{m}{M}=\dfrac{13}{65}=0,2\left(mol\right)\\ n_{HCl}=\dfrac{m}{M}=\dfrac{3,65}{\left(1+35,5\right)}=0,1\left(mol\right)\)
Tỉ lệ: \(\dfrac{0,2}{1}>\dfrac{0,1}{2}\Rightarrow Zn\) dư và dư \(m_{Zn}=n.M=0,2.65=13\left(g\right)\)
\(PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\)
1 2 1 1
0,05 0,1 0,05 0,05
\(m_{ZnCl_2}=n.M=0,05.\left(65+35,5.2\right)=6,8\left(g\right)\\ m_{H_2}=n.M=0,05.2=0,1\left(g\right).\)
a)\(PTHH:Zn+2HCl\xrightarrow[]{}ZnCl_2+H_2\)
b)\(n_{Zn}=\dfrac{13}{65}=0,2\left(m\right)\)
\(n_{HCl}=\dfrac{3,65}{36,5}=0,1\left(m\right)\)
\(PTHH:Zn+2HCl\xrightarrow[]{}ZnCl_2+H_2\)
ta có tỉ lệ:\(\dfrac{0,2}{1}>\dfrac{0,1}{2}=>Zn\) dư
\(PTHH:Zn+2HCl\xrightarrow[]{}ZnCl_2+H_2\)
tỉ lệ :1 2 1 2
số mol :0,05 0,1 0,05 0,05
\(m_{ZnCl_2}=0,05.136=6,8\left(g\right)\)
\(m_{H_2}=0,05.2=0,1\left(g\right)\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(1mol\) \(2mol\) \(1mol\) \(1mol\)
\(0,05mol\) \(0,1mol\) \(0,05mol\) \(0,05mol\)
\(n_{Zn}=\dfrac{m}{M}=\dfrac{13}{65}=0,2\left(mol\right)\)
\(N_{HCl}=\dfrac{m}{M}=\dfrac{3,65}{36,5}=0,1\left(mol\right)\)
\(\text{Ta thấy Zn dư,HCl phản ứng hết}\)
\(m_{ZnCl_2}=n.M=0,05.136=6,8\left(g\right)\)
\(m_{H_2}=n.M=0,05.2=0,1\left(g\right)\)
