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![](https://rs.olm.vn/images/avt/0.png?1311)
\(m_{Fe_2O_3}=1000000.60\%=600000(g)\\ \Rightarrow n_{Fe_2O_3}=\dfrac{600000}{160}=3750(mol)\\ PTHH:Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\\ \Rightarrow n_{Fe}=2n_{Fe_2O_3}=7500(mol)\\ \Rightarrow m_{Fe(\text {Phản ứng})}=7500.56=420000(g)\\ \Rightarrow m_{Fe(\text {Thực tế)}}=420000.80\%=336000(g)\\ \Rightarrow m_{gang}=\dfrac{336000}{95\%}\approx353684(g)=353,684(kg)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: mFe = 2.90% = 1,8 (tấn) = 1800000 (g)
\(\Rightarrow n_{Fe}=\dfrac{1800000}{56}=\dfrac{225000}{7}\left(mol\right)\)
BTNT Fe, có: nFe2O3 = 1/2nFe = 112500/7 (mol)
\(\Rightarrow m_{Fe_2O_3}=\dfrac{112500}{7}.160=\dfrac{18000000}{7}\left(g\right)=\dfrac{18}{7}\left(tan\right)\)
Vì: H% = 80% ⇒ mFe2O3 (thực tế) = 18/7:80% = 45/14 (tấn)
Mà: Quặng hematit chứa 60% Fe2O3
⇒ mquặng = 45/14:60% ≃ 5,36 (tấn)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(m_{Fe}=0.95\left(tấn\right)=0.95\cdot10^3\left(kg\right)\)
\(\Rightarrow n_{Fe}=\dfrac{0.95\cdot10^3}{56}=\dfrac{19}{1120}\cdot10^3\left(kmol\right)\)
\(\Rightarrow n_{Fe_2O_3}=\dfrac{1}{2}\cdot\dfrac{19}{1120}\cdot10^3\left(kmol\right)\)
\(m_{Fe_2O_3}=\dfrac{19}{2240}\cdot10^3\cdot160=1357.1\left(kg\right)\)
\(\Rightarrow m_{quặng}=\dfrac{1357.1}{60\%}=2261.9\left(kg\right)\)
\(A\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(PTHH:S+O_2\underrightarrow{t^o}SO_2\\ SO_2+\frac{1}{2}O_2\xrightarrow[V_2O_5]{t^o}SO_3\\ SO_3+H_2O\rightarrow H_2SO_4\)
\(m_{S\cdot trong\cdot FeS_2}=320.10^6.45\%=144.10^6\left(g\right)\)
\(n_S=\frac{144.10^6}{32}=45.10^5\left(mol\right)\)
Theo pt: \(n_S=n_{SO_2}=n_{SO_3}=n_{H_2SO_4}\)
\(\Rightarrow n_{H_2SO_4}=45.10^5\left(mol\right)\)
\(\Rightarrow m_{H_2SO_4}=45.10^5.98=441.10^6\left(g\right)=441\left(ton\right)\)
\(H=\frac{441}{450}.100\%=98\left(\%\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 1:
Ta có: 1 tấn = 1000 kg
⇒ mFe = 1000.95% = 950 (kg)
\(\Rightarrow n_{Fe}=\dfrac{950}{56}\left(kmol\right)\)
BTNT Fe, có: \(n_{Fe_2O_3\left(LT\right)}=\dfrac{1}{2}n_{Fe}=\dfrac{475}{56}\left(kmol\right)\)
Mà: H = 80% \(\Rightarrow n_{Fe_2O_3\left(TT\right)}=\dfrac{475}{56}:80\%=\dfrac{2375}{224}\left(kmol\right)\)
\(\Rightarrow m_{Fe_2O_3\left(TT\right)}=\dfrac{2375}{224}.160=\dfrac{11875}{7}\left(kg\right)\)
⇒ m quặng \(=\dfrac{m_{Fe_2O_3}}{60\%}\approx2827,38\left(kg\right)\)
Câu 2:
Ta có: 65nZn + 27nAl = 3,79 (1)
PT: \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
Theo PT: \(n_{H_2}=n_{Zn}+\dfrac{3}{2}n_{Al}=\dfrac{1,792}{22,4}=0,08\left(mol\right)\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{Zn}=0,05\left(mol\right)\\n_{Al}=0,02\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{Zn}=0,05.65=3,25\left(g\right)\\m_{Al}=0,02.27=0,54\left(g\right)\end{matrix}\right.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1. Ta có : mgang =100(tấn)
Mà có 5% nguyên tố ko phải Fe => mFe(trong 100 tấn gang)=95 (tấn)
Mà trong quá trình luyện gang lượng sắt hao hụt là 4%
=> mFe (ban đầu)=98,96(tấn)
Fe3O4 + H2
Fe3O4 + 4CO -to-> 3Fe + 4CO2 (1)
Ta có : 1mol Fe3O4 --> 3mol Fe
232g Fe3O4 --> 168g Fe
=> 232 tấn Fe3O4 --> 168 tấn Fe
=> x tấn Fe3O4 --> 98,96 tấn Fe
=> x=136,66(tấn)
Mà trong quặng hematit Fe3O4 chỉ chiếm 80%
=> mquặng=170,825(tấn)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: mFe = 1000.96% = 960 (kg)
\(\Rightarrow n_{Fe}=\dfrac{960}{56}=\dfrac{120}{7}\left(kmol\right)\)
BTNT Fe: \(n_{Fe_2O_3\left(LT\right)}=\dfrac{1}{2}n_{Fe}=\dfrac{60}{7}\left(kmol\right)\)
\(\Rightarrow m_{Fe_2O_3\left(LT\right)}=\dfrac{60}{7}.160=\dfrac{9600}{7}\left(kg\right)\)
Mà: H = 80%
\(\Rightarrow m_{Fe_2O_3\left(TT\right)}=\dfrac{m_{Fe_2O_3\left(LT\right)}}{80\%}\approx1714,3\left(kg\right)=1,7143\) (tấn)
\(m_{Fe_2O_3}=100000.80\%=80000(kg)\\ \Rightarrow n_{Fe_2O_3}=\dfrac{80000}{160}=500(kmol)\\ PTHH:Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\\ \Rightarrow n_{Fe}=2n_{Fe_2O_3}=1000(kmol)\\ \Rightarrow m_{Fe}=1000.56=56000(kg)\\ \Rightarrow m_{Fe(\text {Thực tế})}=56000.60\%=33600(kg)=33,6(tấn)\)