\(n_{HCl}=\frac{182,5.10}{100.36,6}=0,5\left(mol\right)\)
\(PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
Theo PT: \(n_{Fe}=n_{H_2}=\frac{1}{2}n_{HCl}=0,25\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,25.56=14\left(g\right)\)
\(\Rightarrow V_{H_2}=0,25.22,4=5,6\left(l\right)\)
b) Áp dụng ĐLBTKL nên ta có:
\(m_{ddFeCl_2}=m_{Fe}+m_{ddHCl}-m_{H_2}\)
\(\Leftrightarrow m_{ddFeCl_2}=14+182,5-0,25.2=196\left(g\right)\)
c)Theo PT: \(n_{FeCl_2}=\frac{1}{2}n_{HCl}=0,25\left(mol\right)\)
\(\Rightarrow C\%_{FeCl_2}=\frac{0,25.127}{196}.100=16,2\%\)
\(n_{HCl}=\frac{10.182,5}{100.36,5}=0,5\left(mol\right)\\ PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\\ m_{Fe}=56.0,25=14\left(g\right)\\ V_{H_2}=22,4.0,25=5,6\left(l\right)\\ m_{ddA}=14+182,5-0,25.2=196\left(g\right)\\ m_A=0,25.127=31,75\left(g\right)\\ C\%_{ddA}=\frac{31,75}{196}.100\%=16,2\left(\%\right)\)
a) \(n_{HCl}=\frac{182,5.10}{100.36,5}=0,5mol\)
PTHH : \(Fe+2HCl\rightarrow FeCl_2+H_2\)
( mol ) 0,25 0,5 0,25 0,25
=> mFe = 56 . 0,25 = 14 g
VH2 = 0,25 . 22,4 = 5,6 l
b) Áp dụng ĐLBTKL ta có :
mdd FeCl2 ( A) = 14 + 182,5 - 0,25 . 2 =196 g
c) mFeCl2 ( A) = 0,25 . 127 = 31,75g
=>C% dd FeCl2(A) = \(\frac{31,75}{196}.100\%=16,2\%\)
mHCl = 18.25 g
nHCl = 0.5 mol
Fe + 2HCl --> FeCl2 + H2
0.25_0.5_____0.25____0.25
mFe = 0.25*56 = 14 g
VH2 = 5.6 (l)
mdd sau phản ứng = 14 + 182.5 - 0.5 = 196 g
mFeCl2=31.75 g
C%FeCl2 = 31.75/196*100% = 16.2%