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pứ: Fe + 2HCl -> FeCl2 + H2
b. nFe = \(\dfrac{5,6}{56}\)= 0,1 mol
Từ pt suy ra được: nHCl = 2.nFe= 0,2 mol
=> mHCl = 0,2. 36,5 = 7,3 g
c. nH2 = nFe = 0,1 mol
=> VH2 = 0,1.22,4 = 2,24 (lít)
\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
a) PTHH: Fe + 2HCl --> FeCl2 + H2
_______0,2---->0,4----->0,2--->0,2
=> VH2 = 0,2.22,4 = 4,48(l)
b) mHCl = 0,4.36,5 = 14,6(g)
c) mFeCl2 = 0,2.127 = 25,4 (g)
\(n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ 0,03....0,06.....0,03.......0,03\left(mol\right)\\ a,V_{H_2\left(đktc\right)}=0,03.22,4=0,672\left(l\right)\\ b,m_{HCl}=0,06.36,5=2,19\left(g\right)\\ c,m_{FeCl_2}=127.0,03=3,81\left(g\right)\)
\(a,n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\)
\(PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\\ \Rightarrow n_{H_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow V_{H_2\left(đktc\right)}=0,03\cdot22,4=0,672\left(l\right)\\ b,n_{HCl}=2n_{Fe}=0,06\left(mol\right)\\ \Rightarrow m_{HCl}=0,06\cdot36,5=2,19\left(g\right)\\ c,n_{FeCl_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow m_{FeCl_2}=0,03\cdot127=3,81\left(g\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\\ a.n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\\ n_{H_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow V_{H_2}=0,03.22,4=0,672\left(l\right)\\ b.n_{HCl}=2n_{Fe}=0,06\left(mol\right)\\ m_{HCl}=0,06.36,5=2,19\left(g\right)\\ c.n_{FeCl_2}=n_{Fe}=0,03\left(mol\right)\\ m_{FeCl_2}=0,03.127=3,81\left(g\right)\)
mFe= 8,4/56= 0,15 mol
m HCl = 14,6/36,5=0,4 mol
PTHH: Fe +2HCl →FeCl2 +H2
Bđ: 0,15 0,4 0 0 mol
Pứ: o,15→0,3 0,15 0,15 mol
Sau pứ:0 0,1 0,15 0,15 mol
a. HCl dư: m =0,1.36,5=3,65 g
b. m FeCl2 = 0,15.127=19,05 g
c. m H2 = 0,15.2= 0,3 g
V H2= 0,15.22,4=3,36 (l)
Fe + 2HCl \(\rightarrow FeCl_2+H_2\)
a) nFe = \(\dfrac{5,6}{56}=0,1mol\)
Theo pt nH2 = nFe = 0,1 mol
=> VH2 = 0,1.22,4 = 2,24 lít
b) Theo pt: nFeCl2 = nFe = 0,1 mol
=> mFeCl2 = 0,1.127 = 12,7g
c) Theo pt : nHCl = 2nFe = 0,2 mol
=> mHCl = 0,2.36,5 = 7,3g
\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(0.2......0.4..........0.2...........0.2\)
\(V_{H_2}=0.2\cdot22.4=4.48\left(l\right)\)
\(m_{HCl}=0.4\cdot36.5=14.6\left(g\right)\)
\(m_{FeCl_2}=0.2\cdot127=25.4\left(g\right)\)
\(PTPU:Fe+2HCl\rightarrow FeCl_2+H_2\)
\(a.n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
\(\Rightarrow V_{Fe}=0,2.22,4=4,48\left(l\right)\)
\(b.\) ta có: \(n_{HCl}=2\)
\(\Rightarrow n_{Fe}=0,2.2=0,4\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)
\(c.n_{FeCl_2}=n_{Fe}=0,2mol\)
\(\Rightarrow m_{FeCl_2}=0,2.127=25,4\left(g\right)\)
\(n_{Fe}=\dfrac{5,6}{56}=0,1mol\)
Fe + 2HCl \(\rightarrow\) FeCl2 + H2
0,1 0,1 ( mol )
\(m_{FeCl_2}=0,1.127=12,7g\)