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mFeS2 (có trong quặng) = 600 (g)
H = 80% => mSO2 (lí thuyết) = 64.100/ 80 = 80 (g)
Bảo toàn khối lượng => mFe2O3 thu được theo lí thuyết = mFeS2 + mO2 - mSO2
= 872 (g)
Vì H = 80% => mFe2O3 (thu được) = 872.80 / 100 = 697,6 (g)
Bài 1)
a \(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
\(n_{Fe_2O_3}=\frac{4,8}{216}\approx\text{0,02 (mol)}\)
\(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
0,02 0,06
\(m_{H_2SO_4}=98\cdot0,06=5,88\left(g\right)\)
b) \(m_{Fe_2\left(SO_4\right)_3}=0,02\cdot400=\text{290.24}\left(g\right)\)
Câu 2 mai làm
Câu 2
a)\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+H_2\)
\(n_{Al}=\frac{5,4}{2,7}=0,2\left(mol\right)\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+H_2\)
0,4 mol 0,6 mol 0,2 mol
\(V_{H_2}=0,2\cdot22,4=4,48\left(l\right)\)
b) \(m_{H_2SO_4}=0,6\cdot98=58,8\left(g\right)\)
Bạn tham khảo câu này ha nếu k cân bằng dc PTHH thì ns với mk nhé https://hoc24.vn/hoi-dap/question/679693.html?pos=1869014
a)
\(2ZnS+3O_2\rightarrow2ZnO+2SO_2\)
\(4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)
b) Đổi: \(44,8m^3=44800l\)
\(n_{SO_2}=\frac{V_{SO_2}}{22,4}=\frac{44800}{22,4}=2000\left(mol\right)\)
\(PTHH:\) câu a
\(Theo\) \(PTHH,\) \(ta có:\)
\(n_{ZnS}=n_{SO_2}=2000\left(mol\right)\)
\(n_{FeS_2}=\frac{4}{8}n_{FeS_2}=\frac{1}{2}n_{FeS_2}=\frac{1}{2}.2000=1000\left(mol\right)\)
\(m_{ZnS}=n_{ZnS}.M_{ZnS}=2000.97=194000\left(g\right)=194\left(kg\right)\)
\(m_{FeS_2}=n_{FeS_2}.M_{FeS_2}=1000.120=120000\left(g\right)=120\left(kg\right)\)
a) 2ZnS +3 O2 \(\rightarrow\) 2ZnO + 2SO2
4FeS2 + 11O2 \(\rightarrow\) 2Fe2O3 +8SO2
b) T a có : nSO2=\(\frac{44,8}{22,4}\)=2 kmol
Nếu dùng ZnS \(\rightarrow\) nZnS=nSO2=2kmol \(\rightarrow\) mZnS=2.(65+32)=194 kg
Nếu dùng FeS2 \(\rightarrow\) nFeS2=\(\frac{1}{2}\)nSO2=1kmol
\(\rightarrow\) mFeS2=1.(56+32.2)=120kg
a) \(n_{Fe_2O_3}=\frac{32}{160}=0,2\left(mol\right)\)
PTHH : \(Fe_2O_3+3H_2-t^o->2Fe+3H_2O\)
Theo pthh : \(n_{H_2}=3n_{Fe_2O_3}=0,6\left(mol\right)\)
=> \(V_{H_2}=0,6\cdot22,4=13,44\left(l\right)\)
b) Theo pthh : \(n_{H_2O}=n_{H_2}=0,6\left(mol\right)\)
=> \(m_{H_2O}=0,6\cdot18=10,8\left(g\right)\)
c) Theo pthh : \(n_{Fe}=2n_{Fe_2O_3}=0,4\left(mol\right)\)
=> \(m_{Fe}=0,4\cdot56=22,4\left(g\right)\)
a) Fe2O3+3H2--->2Fe+3H2O
n Fe=79/56=1,4(mol)
Theo pthh
n Fe2O3=1/2n Fe=0,7(mol)
m Fe2O3=0,7.160=112(g)
b) n H2O=3/2n Fe=0,933(mol)
m H2O=0,933.18=16,794(g)
c) n H2=3/2n Fe=0,933(mol)
V H2=0,933.22,4=20,8992(l)
a)
\(n_{Fe}=\frac{79}{56}\left(mol\right)\)
\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)
79/112_237/112 __79/56__237/112
\(m_{Fe2O3}=\frac{160.79}{112}=112,86\left(g\right)\)
b)
\(m_{H2O}=\frac{237}{112.18}=38,09\left(g\right)\)
c)
\(\rightarrow V_{H2}=\frac{237}{112}.22,4=47,4\left(l\right)\)
\(1.\\ PTHH:Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\\ n_{Fe}=\frac{16,8}{56}=0,3\left(mol\right)\\ m_{Fe_2O_3}=0,15.160=24\left(g\right)\\ m_{CO}=0,45.28=12,6\left(g\right)\\ V_{CO_2}=0,45.22,4=10,08\left(l\right)\)
\(2.\\ PTHH:Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\\ n_{H_2SO_4}=1,5\left(mol\right)\Rightarrow\left\{{}\begin{matrix}n_{Al_2O_3}=n_{Al_2\left(SO_4\right)_3}=0,5\left(mol\right)\\n_{H_2O}=1,5\left(mol\right)\end{matrix}\right.\\ m_{Al_2O_3}=0,5.102=51\left(g\right)\\ m_{H_2O}=18.1,5=27\left(g\right)\\ C_1:m_{Al_2\left(SO_4\right)_3}=0,5.342=171\left(g\right)\\ C_2:m_{Al_2\left(SO_4\right)_3}=51+1,5.98-27=171\left(g\right)\)
PTHH:
\(4FeS+7O_2-->2Fe_2O_3+4SO_2\)
_0,4___0,7________0,2________0,4
\(n_{SO_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
=>\(m_{FeS}=0,4.88=35,2\left(g\right)\)
=>\(m_{Fe_2O_3}=0,2.160=32\left(g\right)\)
_0.4__0.7_______0.2_____0.4 là j vậy bạn