\(n_{Fe} = \dfrac{2,8}{56} = 0,05(mol)\\ Fe + 2HCl \to FeCl_2 + H_2\\ n_{HCl} =2n_{Fe} = 0,05.2 = 0,1(mol)\\ V_{dd\ HCl} = \dfrac{0,1}{2} = 0,05(lít)\)
PTHH: \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
Ta có: \(n_{HCl}=2n_{Fe}=2\cdot\dfrac{2,8}{56}=0,1\left(mol\right)\)
\(\Rightarrow V_{HCl}=\dfrac{0,1}{2}=0,05\left(l\right)=50\left(ml\right)\)
\(n_{Fe}=\dfrac{2.8}{56}=0.05\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(0.05........0.1\)
\(V_{ddHCl}=\dfrac{0.1}{2}=0.05\left(l\right)\)
