nFe=\(\dfrac{2,8}{56}\)=0,05(mol)
a) PTHH: Fe + 2HCl \(\rightarrow\) FeCl2 + H2\(\uparrow\)
b)Theo PTHH ta có: nHCl=2nFe=2.0,05=0,1(mol)
\(\Rightarrow V_{ddHCl}=\dfrac{n}{C_M}=\dfrac{0,1}{2}=0,05\left(l\right)=50\left(ml\right)\)
c)Theo PTHH ta có: nFeCl2=nFe=0,05(mol)
\(\Rightarrow m_{FeCl_2}=0,05.\left(56+35,5.2\right)=6,35\left(g\right)\)
d)Theo PTHH ta có: nH2=nFe=0,05(mol)
\(\Rightarrow V_{H_2}=0,05.22,4=1,12\left(l\right)\)
Chúc bạn học tốt!
nFe=\(\dfrac{2,8}{56}=0,05mol\)
a) pt: Fe + 2HCl \(\rightarrow\) FeCl2 + H2
npu: 0,05\(\rightarrow0,1\) \(\rightarrow0,05\rightarrow0,05\)
b) => VHCl= \(\dfrac{2}{0,1}=20l\)
c) mFeCl2= 0,05.127=6,35g
d) VH2 = 0,05 . 22,4=1,12l
e) Tính nồng độ mol của dd mà ko thay đổi so với VHCl ban đầu là
\(C_{M_{ddFeCl_2}}=\dfrac{n}{V}=\dfrac{0,05}{0,05}=1M\)
a) PTHH: Fe + 2HCl → FeCl2 + H2
\(n_{Fe}=\dfrac{2,8}{56}=0,05\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{Fe}=2\times0,05=0,1\left(mol\right)\)
\(\Rightarrow V_{ddHCl}=\dfrac{0,1}{2}=0,05\left(l\right)=50\left(ml\right)\)
c) Theo PT: \(n_{FeCl_2}=n_{Fe}=0,05\left(mol\right)\)
\(\Rightarrow m_{FeCl_2}=0,05\times127=6,35\left(g\right)\)
d) Theo PT: \(n_{H_2}=n_{Fe}=0,05\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,05\times22,4=1,12\left(l\right)\)