a, \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)
\(n_{HCl}=2n_{H_2}=0,3\left(mol\right)\Rightarrow m_{HCl}=0,3.36,5=10,95\left(g\right)\)
b, \(n_{FeCl_2}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{FeCl_2}=0,15.127=19,05\left(g\right)\)
\(a/n_{H_2}=\dfrac{3,36}{22,4}=0,15mol\\ Fe+2HCl\rightarrow FeCl_2+H_2\)
0,15 0,3 0,15 0,15
\(m_{Fe}=0,15.56=8,4g\\ m_{HCl}=0,3.36,5=10,95g\\ b/m_{FeCl_2}=0,15.127=19,05g\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
0,15 0,3 0,15 0,15
\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
\(a,m_{Fe}=0,15.56=8,4\left(g\right)\)
\(m_{HCl}=0,3.36,5=10,95\left(g\right)\)
\(b,m_{FeCl_2}=0,15.127=19,05\left(g\right)\)
TTĐ:
a) \(V_{H_2}=3,36\left(l\right)\)
\(m_{Fe}=?\left(g\right)\)
\(m_{HCl}=?\left(g\right)\)
b) \(m_{FeCl_2}=?\left(g\right)\)
Giải
\(n_{H_2}=\dfrac{V}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
0,15 : 0,3 : 0,15 <- 0,15 (mol)
\(m_{Fe}=n.M=0,15.56=8,4\left(g\right)\)
\(m_{HCl}=n.M=0,3.36,5=10,95\left(g\right)\)
\(m_{FeCl_2}=n.M=0,15.127=19,05\left(g\right)\)