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\(n_{Fe_2O_3}=\dfrac{12}{160}=0,075\left(mol\right)\\a, Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\\ b,n_{H_2}=3.0,075=0,225\left(mol\right)\\ V_{H_2\left(đkc\right)}=24,79.0,225=5,57775\left(l\right)\\ c,n_{Fe}=2.0,075=0,15\left(mol\right)\\ m_{Fe}=0,15.56=8,4\left(g\right)\)
\(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\\
pthh:Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
0,25 0,25 0,25
=> \(V_{H_2}=0,25.22,4=5,6\left(l\right)\)
\(m_{FeSO_4}=152.0,25=38\left(g\right)\)
\(pthh:CuO+H_2\underrightarrow{t^o}H_2O+Cu\)
0,25 0,25 0,25
=> \(m_{Cu}=0,25.64=16\left(g\right)\)
nFe = 14/56 =0,25 mol
PTHH : Fe + H2SO4 => FeSO4 + H2 (1)
Theo pt(1) : nH2 = nFe = 0,25 mol
VO2 = 0,25 x 22,4 = 5,6 l
Theo pt(1): nFeSO4 = nFe = 0,25 mol
mFeSO4= 0,25 x 152 = 38 g
PTHH : H2 + CuO => Cu + H2O(2)
theo pt (2) => nH2 = nCu = 0,25 mol
mCu = 0,25 x 64 = 16 g
\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
PT: \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
Theo PT: \(n_{Cl_2}=\dfrac{3}{2}n_{Fe}=0,3\left(mol\right)\Rightarrow V_{Cl_2}=0,3.24,79=7,437\left(l\right)\)
\(n_{FeCl_3}=n_{Fe}=0,2\left(mol\right)\Rightarrow m_{FeCl_3}=0,2.162,5=32,5\left(g\right)\)
\(n_{HCl}=0,5.0,2=0,1\left(mol\right)\)
Pt : \(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,05<--0,1----->0,05--->0,05
\(m_{Fe}=0,05.56=2,8\left(g\right)\)
\(m_{FeCl2}=0,05.127=6,35\left(g\right)\)
\(V_{H2\left(dktc\right)}=0,05.22,4=1,12\left(l\right)\)
\(V_{H2\left(dkc\right)}=0,05.24,79=1,2395\left(l\right)\)
a, \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)
\(n_{HCl}=2n_{H_2}=0,3\left(mol\right)\Rightarrow m_{HCl}=0,3.36,5=10,95\left(g\right)\)
b, \(n_{FeCl_2}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{FeCl_2}=0,15.127=19,05\left(g\right)\)
Bài 2: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
Theo PTHH: \(n_{Fe}=n_{H_2}=0,1\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,1\cdot22,4=2,24\left(l\right)\)
Theo PTHH: \(n_{FeCl_2}=n_{Fe}=0,1\left(mol\right)\)
\(\Rightarrow m_{FeCl_2}=127\cdot0,1=12,7\left(g\right)\)
\(a.Fe+H_2SO_4\rightarrow FeSO_4+H_2\\b. n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\\ n_{H_2SO_4}=n_{Fe}=0,4\left(mol\right)\\ \Rightarrow m_{H_2SO_4}=0,4.98=39,2\\ c.n_{H_2}=n_{Fe}=0,4\left(mol\right)\\ \Rightarrow V_{H_2}=0,4.22,4=8,96\left(l\right)\\ d.H_2+CuO-^{t^o}\rightarrow Cu+H_2O\\ n_{Cu}=n_{H_2}=0,4\left(mol\right)\\ \Rightarrow m_{Cu}=0,4.64=25,6\left(g\right)\)
d) PTHH: H2+CuO---to---> H2O+Cu
0,4 0,4
mCuO=n.M=0,4x80=32g
\(n_{HCl}=0,3.1=0,3\left(mol\right)\\
pthh:Fe+2HCl\rightarrow FeCl_2+H_2\)
0,15 0,3 0,15
\(m_{Fe}=0,15.56=8,4\left(g\right)\\
V_{H_2}=0,15.22,4=3,36\left(l\right)\)
\(a)Fe_2O_3+3H_2\xrightarrow[]{t^0}2Fe+3H_2O\)
\(b)n_{Fe}=\dfrac{1,6}{160}=0,01mol\)
\(Fe_2O_3+3H_2\xrightarrow[]{t^0}2Fe+3H_2O\)
0,01 0,03 0,02
\(V_{H_2}=0,03.24,79=0,7437l\\ c)m_{Fe}=0,02.56=1,12g\)