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TL:
Tham khảo nhé:
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@tuantuthan
HT
\(n_{CaCO_3}=\dfrac{200}{100}=2\left(mol\right)\)
PTHH: CO2 + Ca(OH)2 ---> CaCO3 + H2O
2 2
\(n_{Fe}=\dfrac{266}{56}=4,75\left(mol\right)\)
PTHH:
Fe2O3 + 3CO --to--> 3CO2 + 2Fe
\(\dfrac{1}{3}\) 2 2 \(\dfrac{2}{3}\)
=> nFe (H2) = \(4,75-\dfrac{2}{3}=\dfrac{49}{12}\left(mol\right)\)
Fe2O3 + 3H2 --to--> 2Fe + 3H2O
\(\dfrac{49}{24}\) 6,125 \(\dfrac{49}{12}\)
\(\rightarrow\left\{{}\begin{matrix}V_{CO}=2.22,4=44,8\left(l\right)\\V_{H_2}=6,125.22,4=137,2\left(l\right)\\m_{Fe_2O_3}=\left(\dfrac{1}{3}+\dfrac{49}{24}\right).160=380\left(g\right)\end{matrix}\right.\)
số oxh của Fe cả quá trình k đổi..bảo toàn e =>nCaC03=nC02=n0=n02/2=0,05 mol
PTHH: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
a+b) \(n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{Fe_2O_3}=0,2\left(mol\right)\\n_{H_2}=0,6\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{Fe_2O_3}=0,2\cdot160=32\left(g\right)\\V_{H_2}=0,6\cdot22,4=13,44\left(l\right)\end{matrix}\right.\)
c) PTHH: \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\uparrow\)
Theo PTHH: \(n_{Zn}=n_{H_2}=0,6\left(mol\right)\)
\(\Rightarrow m_{Zn}=0,6\cdot65=39\left(g\right)\)
a,
nFe = 22,4/56 = 0,4 (mol)
PTHH
Fe2O3 + 3H2 ---to----) 2Fe + 3H2O (1)
theo phương trình (1) ,ta có:
nFe2O3 = 0,4 x 2 / 1 = 0,8 (mol)
mFe2O3 = 160 x 0,8 = 128 (g)
b,
theo pt (1)
nH2 = (0,4 x 3)/2 = 0,6 (mol)
=) VH2 = 0,6 x 22,4 = 13,44 (L)
c,
PTHH
Zn + H2SO4 -------------) ZnSO4 + H2 (2)
Số mol H2 cần dùng là 0,6 (mol)
Theo PT (2) :
nZn = nH2 ==) nZn = 0,6 x 65 = 39 (g)
\(a,n_{Fe_2O_3}=\dfrac{8}{160}=0,05\left(mol\right)\\ PTHH:Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\\ Mol:0,05\rightarrow0,15\rightarrow0,1\\ m_{Fe}=0,1.56=5,6\left(g\right)\\ b,V_{H_2}=0,15.22,4=3,36\left(l\right)\\ c,n_{O_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\\ \\ PTHH:3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\\ LTL:\dfrac{0,1}{3}>\dfrac{0,05}{2}\Rightarrow Fe.dư\\ n_{Fe_3O_4}=\dfrac{0,05}{2}=0,025\left(mol\right)\\ m_{Fe_3O_4}=0,025.232=5,8\left(g\right)\)
nFe2O3 = 8 : 160 = 0,05 (mol)
pthh: Fe2O3 + 3H2 -t--> 2Fe + 3H2O
0,05--------0,15----->0,1 (mol)
=> VH2= 0,15 . 22,4 = 3,36 (L)
=> mFe = 0,1 . 56 = 5,6 (g)
nO2 = 1,12 : 22,4 = 0,05 (mol)
pthh : 2H2+ O2 -t-> 2H2O
LTL :
0,15/2 > 0,05/1
=> H2 du
theo pt , nH2O = 2 nO2 = 0,1 (mol)
=> mH2O = 0,1 .18 = 1,8 (g)
\(a,n_{CaCO_3}=\dfrac{200}{100}=2\left(mol\right)\\ Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
2 2
\(Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\)
\(\dfrac{1}{6}\) 2 \(\dfrac{2}{3}\) 2
\(n_{Fe\left(thu.được\right)}=\dfrac{266}{56}=4,75\left(mol\right)\)
\(\rightarrow n_{Fe\left(H_2\right)}=4,75-\dfrac{2}{3}=\dfrac{49}{12}\left(mol\right)\)
\(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
\(\dfrac{49}{24}\) 6,125 \(\dfrac{49}{12}\)
\(\rightarrow\left\{{}\begin{matrix}V_{CO}=2.22,4=44,8\left(l\right)\\V_{H_2}=6,125.22,4=137,2\left(l\right)\\m_{Fe_2O_3}=\left(\dfrac{1}{6}+\dfrac{49}{24}\right).160=\dfrac{1060}{3}\left(g\right)\end{matrix}\right.\)