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a/ \(4FeS_2\left(\frac{388000}{11}\right)+11O_2\left(97000\right)\rightarrow2Fe_2O_3\left(\frac{194000}{11}\right)+8SO_2\left(\frac{776000}{11}\right)\)
\(m_{FeS_2}=5600000.0,75=4200000\)
\(\Rightarrow n_{FeS_2}=\frac{4200000}{120}=35000\)
\(n_{O_2}=\frac{3104000}{32}=97000\)
Ta thấy: \(\frac{35000}{4}>\frac{97000}{11}\) nên O2 phản ứng hết
\(m_{Fe_2O_3}=\frac{194000}{11}.160=2821818,18\)
b/ \(SO_2\left(\frac{776000}{11}\right)+Ca\left(OH\right)_2\rightarrow CaSO_3\left(\frac{776000}{11}\right)+H_2O\)
\(m_{CaSO_3}=\frac{776000}{11}.120=8465454,55\)
\(n_{Fe} = \dfrac{5000.1000}{56} = \dfrac{625000}{7}\ kmol\\ n_{FeS_2\ đã\ dùng} = \dfrac{n_{Fe}}{H\%} = \dfrac{\dfrac{625000}{7}}{89,6\%} = 99649,23\ kmol\\ m_{quăng\ pirit} = \dfrac{m_{FeS_2}}{90\%} = \dfrac{99649,23.120}{90\%} = 13259897,33 (kg) = 13259,89(tấn)\)
\(n_{Fe}=\dfrac{5000\cdot10^6}{56}=\dfrac{625}{7}\cdot10^6\left(mol\right)\)
\(BTFe:\)
\(n_{FeS_2}=n_{Fe}=\dfrac{625}{7}\cdot10^6\left(mol\right)\)
\(n_{FeS_2\left(tt\right)}=\dfrac{\dfrac{625}{7}\cdot10^6}{89.6}=\dfrac{56000\cdot10^6}{7}\left(mol\right)\)
\(\Rightarrow m_{FeS_2}=\dfrac{56000\cdot10^6\cdot120}{7}=960000\cdot10^6\left(g\right)=960000\left(tấn\right)\)
\(m_{quặng}=\dfrac{960000\cdot100}{90}=1066666.67\left(tấn\right)\)
nFe= 0,03(mol)
a) PTHH: 3 Fe +2 O2 -to-> Fe3O4
nFe3O4= nFe/3= 0,03/3=0,01(mol)
=> mFe3O4=232.0,01=2,32(g)
b) nO2= 2/3 . nFe3O4= 2/3 . 0,03=0,02(mol)
=>V(O2,đktc)=0,02.22,4=0,448(l)
d) V(kk,đktc)=5.V(O2,đktc)= 5.0,448=2,24(l)
\(n_{Fe}=\dfrac{m}{M}=\dfrac{5,6}{56}=0,1\left(mol\right)\\ PTHH:3Fe+2O_2-^{t^o}>Fe_3O_4\)
tỉ lệ: 3 : 2 : 1
n(mol) 0,1--->`1/15` -->`1/30`
\(m_{Fe_3O_4}=n\cdot M=\dfrac{1}{30}\cdot\left(56\cdot3+16\cdot4\right)=\approx7,73\left(g\right)\\ V_{O_2\left(dktc\right)}=n\cdot22,4=\dfrac{1}{15}\cdot22,4=\approx1,5\left(l\right)\)
mtạp chất=120.10%=12(tấn)
mFeS2=120-12=108(tấn)
mFe lý thuyết=\(\dfrac{108}{120}.56=50,4\left(tấn\right)\)
H=\(\dfrac{48}{50,4}.100\%=95,238\%\)
\(m_{FeS_2}=400.\left(100-10\right)\%=360\left(g\right)\\ \rightarrow n_{FeS_2}=\dfrac{360}{120}=3\left(mol\right)\)
PTHH: 4FeS2 + 11O2 --to--> 2Fe2O3 + 8SO2
3 3
\(\rightarrow V_{SO_2}=6.22,4=134,4\left(l\right)\)
Fe2O3 oxit bazo, SO2 oxit axit
a)
$m_{Fe_2O_3} = 1000.90\% = 900(kg)$
$n_{Fe_2O_3} = \dfrac{900}{160} = 5,625(kmol)$
$n_{Fe} = 2n_{Fe_2O_3} = 11,25(kmol)$
$m_{Fe} = 11,25.56 = 630(kg)$
b)
$n_{Fe} = \dfrac{1000}{56}(kmol)$
$n_{Fe_2O_3} = 0,5n_{Fe} = \dfrac{125}{14}(kmol)$
$m_{Fe_2O_3} = \dfrac{125}{14}.160 = \dfrac{10000}{7}(kg)$
$m_{quặng} = \dfrac{10000}{7} : 90\% = 1587,3(kg)$
