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\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
_____0,2_____0,4__________0,2 (mol)
a, \(m_{HCl}=0,4.36,5=14,6\left(g\right)\)
b, \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)
\(Fe_2O_3=\dfrac{24}{160}=0,15\left(mol\right)\\ PTHH:Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\\ n_{Fe_2\left(SO_4\right)_3}=n_{Fe_2O_3}=0,15\left(mol\right)\\ a,m_{Fe_2\left(SO_4\right)_3}=400.0,15=60\left(g\right)\\ b,n_{H_2SO_4}=3n_{Fe_2O_3}=3.0,15=0,45\left(mol\right)\\ C_{MddH_2SO_4}=\dfrac{0,45}{0,2}=2,25\left(M\right)\\ c,V_{ddsau}=V_{ddH_2SO_4}=0,2\left(l\right)\\ C_{MddFe_2\left(SO_4\right)_3}=\dfrac{0,15}{0,2}=0,75\left(M\right)\)
Ta có: \(n_{Al}=\dfrac{4,86}{27}=0,18\left(mol\right)\)
PT: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
a, \(n_{HCl}=3n_{Al}=0,54\left(mol\right)\Rightarrow C_{M_{HCl}}=\dfrac{0,54}{0,15}=3,6\left(M\right)\)
b, \(n_{AlCl_3}=n_{Al}=0,18\left(mol\right)\Rightarrow m_{AlCl_3}=0,18.133,5=24,03\left(g\right)\)
c, \(n_{H_2}=\dfrac{3}{2}n_{Al}=0,27\left(mol\right)\Rightarrow V_{H_2}=0,27.24,79=6,6933\left(l\right)\)
\(n_{Fe}=\dfrac{7}{56}=\dfrac{1}{8}\left(mol\right)\)
\(n_S=\dfrac{4}{32}=\dfrac{1}{8}\left(mol\right)\)
PTHH :
\(Fe+S\rightarrow\left(t^o\right)FeS\)
1/8 1/8 1/8 (mol)
\(m_{FeS}=\dfrac{1}{8}.88=11\left(g\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
Theo PTHH: \(n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\)
\(m_{FeCl_2}=0,2\cdot127=25,4\left(g\right)\)