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a. \(n_{H_2}=\dfrac{7.437}{24,79}=0,3\left(mol\right)\)
PTHH : 2Al + 6HCl -> 2AlCl3 + 3H2
0,2 0,6 0,3
\(m_{Al}=0,2.27=5,4\left(g\right)\)
\(m_{HCl}=0,6.36,5=21,9\left(g\right)\)
nH2 = 7,437/24,79 = 0,3 (mol)
PTHH: 2Al + 6HCl -> 2AlCl3 + 3H2
Mol: 0,2 <--- 0,6 <--- 0,2 <--- 0,3
mAl = 0,2 . 27 = 5,4 (g)
mHCl = 0,6 . 36,5 = 21,9 (g)
mAlCl3 = 0,2 . 204,5 = 40,9 (g)
PTHH: Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O
Mol: 0,1 <--- 0,3
mFe2O3 = 0,1 . 160 = 16 (g)
Zn+2HCl-to>ZnCl2+H2
0,3----0,6-----0,3----0,3
n H2=\(\dfrac{7,437}{24,79}\)=0,3 mol
=>m Zn=0,3.65=19,5g
=>m HCl=0,6.36,5=21,9g
=>m ZnCl2=0,3.136=40,8g
Fe2O3+3H2-to>2Fe+3H2O
0,1------0,3----------0,2 mol
=>m Fe=0,2.56=11,2g
a)\(n_{H_2}=\dfrac{7,437}{22,4}=0,332mol\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,332 0,664 0,332 0,332
b)\(m_{Zn}=0,332\cdot65=21,58g\)
\(m_{HCl}=0,664\cdot36,5=24,236g\)
\(m_{ZnCl_2}=0,332\cdot136=45,152g\)
c)\(3H_2+Fe_2O_3\rightarrow2Fe+3H_2O\)
0,332 0,221
\(m_{Fe}=0,221\cdot56=12,376g\)
3H2+Fe2O3-to>2Fe+3H2O
0,6-------0,2---------0,4
n H2=\(\dfrac{14,874}{24,79}\)=0,6 mol
=>m Fe2O3=0,2.160=32g
=>m Fe=0,4.56=22,4g
a) \(n_{Zn}=\dfrac{9,75}{65}=0,15\left(mol\right)\)
PTHH: Zn + 2HCl --> ZnCl2 + H2
0,15-->0,3------>0,15-->0,15
=> mHCl = 0,3.36,5 = 10,95 (g)
b)
mZnCl2 = 0,15.136 = 20,4 (g)
c)
PTHH: Fe2O3 + 3H2 --to--> 2Fe + 3H2O
0,05<---0,15------->0,1
=> mFe2O3 = 0,05.160 = 8 (g)
mFe = 0,1.56 = 5,6 (g)
a.b.\(n_{Zn}=\dfrac{m_{Zn}}{M_{Zn}}=\dfrac{9,75}{65}=0,15mol\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,15 0,3 0,15 0,15 ( mol )
\(m_{HCl}=n_{HCl}.M_{HCl}=0,3.36,5=10,95g\)
\(m_{ZnCl_2}=n_{ZnCl_2}.M_{ZnCl_2}=0,15.136-20,4g\)
c.\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)
0,05 0,15 0,1 ( mol )
\(m_{Fe_2O_3}=n_{Fe_2O_3}.M_{Fe_2O_3}=0,05.160=8g\)
\(m_{Fe}=n_{Fe}.M_{Fe}=0,1.56=5,6g\)
a,
\(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
b, \(nFe=\dfrac{16,8}{56}=0,3\left(mol\right)\)
\(\Rightarrow nO_2=0,3.\dfrac{2}{3}=0,2\left(mol\right)\)
\(VO_2=0,2.24,79=4,958\left(l\right)\)
c, \(nFe_3O_4=0,1\left(mol\right)\)
\(mFe_3O_4=0,1.232=23,2\left(gam\right)\)
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, \(n_{FeCl_2}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{FeCl_2}=0,15.127=19,05\left(g\right)\)
a)
\(n_{H_2}=\dfrac{7,437}{24,79}=0,3\left(mol\right)\)
PTHH: 2Al + 6HCl --> 2AlCl3 + 3H2
0,2<---0,6<-----0,2<---0,3
=> mAl = 0,2.27 = 5,4 (g)
mHCl = 0,6.36,5 = 21,9 (g)
b) mAlCl3 = 0,2.133,5 = 26,7 (g)
c)
PTHH: Fe2O3 + 3H2 --to--> 2Fe + 3H2O
0,1<---0,3---------->0,2
=> mFe2O3 = 0,1.160 = 16 (g)
d) mFe = 0,2.56 = 11,2 (g)
a.b.\(n_{H_2}=\dfrac{V_{H_2}}{24,79}=\dfrac{7,437}{24,79}=0,3mol\)
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
0,2 0,6 0,2 0,3 ( mol )
\(m_{Al}=n_{Al}.M_{Al}=0,2.27=5,4g\)
\(m_{HCl}=n_{HCl}.M_{HCl}=0,6.36,5=21,9g\)
\(m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,2.133,5=26,7g\)
c.d.\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)
0,1 0,3 0,2 ( mol )
\(m_{Fe_2O_3}=n_{Fe_2O_3}.M_{Fe_2O_3}=0,1.160=16g\)
\(m_{Fe}=n_{Fe}.M_{Fe}=0,2.56=11,2g\)