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Do quặng chứa 10% tạp chất
=> FeS2 chiếm 90%
\(m_{FeS_2}=\dfrac{125.90}{100}=112,5\left(g\right)\)
=> \(n_{FeS_2}=\dfrac{112,5}{120}=0,9375\left(mol\right)\)
PTHH: 4FeS2 + 11O2 --to--> 2Fe2O3 + 8SO2
0,9375---------------------->1,875
=> VSO2 = 1,875.22,4 = 42 (l)
a) PTHH: \(4FeS_2+11O_2\underrightarrow{t^o}2Fe_2O_3+8SO_2\)
b) Ta có: \(m_{FeS_2}=3\cdot80\%=2,4\left(tấn\right)\)\(\Rightarrow n_{FeS_2}=\frac{2,4}{120}=0,02\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{Fe_2O_3}=0,01mol\\n_{SO_2}=0,04mol\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{Fe_2O_3}=0,01\cdot160=1,6\left(tấn\right)\\V_{SO_2}=0,4\cdot22,4=0,896\left(l\right)\end{matrix}\right.\)
\(m_{FeS_2}=400.\left(100-10\right)\%=360\left(g\right)\\ \rightarrow n_{FeS_2}=\dfrac{360}{120}=3\left(mol\right)\)
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 ) \(n_{Fe_2O_3}=\frac{32}{160}=0,2\) mol
\(Fe_2O_3+3H_2\underrightarrow{t^0}2Fe+3H_2O\)
0,2 ->0,6 ->0,4
\(\Rightarrow m_{Fe}=56.0,4=22,4\) gam
b ) \(n_{H_2}=3n_{Fe}=0,6\) mol \(\Rightarrow V_{H_2}=0,6.22,4=13,44\) lít .
\(1,2H_2+O_2\underrightarrow{t}2H_2O\)
\(2Mg+O_2\underrightarrow{t}2MgO\)
\(2Cu+O_2\underrightarrow{t}2CuO\)
\(S+O_2\underrightarrow{t}SO_2\)
\(4Al+3O_2\underrightarrow{t}2Al_2O_3\)
\(C+O_2\underrightarrow{t}CO_2\)
\(4P+5O_2\underrightarrow{t}2P_2O_5\)
\(2,PTHH:C+O_2\underrightarrow{t}CO_2\)
\(a,n_{O_2}=0,2\left(mol\right)\Rightarrow n_{CO_2}=0,2\left(mol\right)\Rightarrow m_{CO_2}=8,8\left(g\right)\)
\(b,n_C=0,3\left(mol\right)\Rightarrow n_{CO_2}=0,3\left(mol\right)\Rightarrow m_{CO_2}=13,2\left(g\right)\)
c, Vì\(\frac{0,3}{1}>\frac{0,2}{1}\)nên C phản ửng dư, O2 phản ứng hết, Bài toán tính theo O2
\(n_{O_2}=0,2\left(mol\right)\Rightarrow n_{CO_2}=0,2\left(mol\right)\Rightarrow m_{CO_2}=8,8\left(g\right)\)
\(3,PTHH:CH_4+2O_2\underrightarrow{t}CO_2+2H_2O\)
\(C_2H_2+\frac{5}{2}O_2\underrightarrow{t}2CO_2+H_2O\)
\(C_2H_6O+3O_2\underrightarrow{t}2CO_2+3H_2O\)
\(4,a,PTHH:4P+5O_2\underrightarrow{t}2P_2O_5\)
\(n_P=1,5\left(mol\right)\Rightarrow n_{O_2}=1,2\left(mol\right)\Rightarrow m_{O_2}=38,4\left(g\right)\)
\(b,PTHH:C+O_2\underrightarrow{t}CO_2\)
\(n_C=2,5\left(mol\right)\Rightarrow n_{O_2}=2,5\left(mol\right)\Rightarrow m_{O_2}=80\left(g\right)\)
\(c,PTHH:4Al+3O_2\underrightarrow{t}2Al_2O_3\)
\(n_{Al}=2,5\left(mol\right)\Rightarrow n_{O_2}=1,875\left(mol\right)\Rightarrow m_{O_2}=60\left(g\right)\)
\(d,PTHH:2H_2+O_2\underrightarrow{t}2H_2O\)
\(TH_1:\left(đktc\right)n_{H_2}=1,5\left(mol\right)\Rightarrow n_{O_2}=0,75\left(mol\right)\Rightarrow m_{O_2}=24\left(g\right)\)
\(TH_2:\left(đkt\right)n_{H_2}=1,4\left(mol\right)\Rightarrow n_{O_2}=0,7\left(mol\right)\Rightarrow m_{O_2}=22,4\left(g\right)\)
\(5,PTHH:S+O_2\underrightarrow{t}SO_2\)
\(n_{O_2}=0,46875\left(mol\right)\)
\(n_{SO_2}=0,3\left(mol\right)\)
Vì\(0,46875>0,3\left(n_{O_2}>n_{SO_2}\right)\)nên S phản ứng hết, bài toán tính theo S.
\(a,\Rightarrow n_S=n_{SO_2}=0,3\left(mol\right)\Rightarrow m_S=9,6\left(g\right)\)
\(n_{O_2}\left(dư\right)=0,16875\left(mol\right)\Rightarrow m_{O_2}\left(dư\right)=5,4\left(g\right)\)
\(6,a,PTHH:C+O_2\underrightarrow{t}CO_2\)
\(n_{O_2}=1,5\left(mol\right)\Rightarrow n_C=1,5\left(mol\right)\Rightarrow m_C=18\left(g\right)\)
\(b,PTHH:2H_2+O_2\underrightarrow{t}2H_2O\)
\(n_{O_2}=1,5\left(mol\right)\Rightarrow n_{H_2}=0,75\left(mol\right)\Rightarrow m_{H_2}=1,5\left(g\right)\)
\(c,PTHH:S+O_2\underrightarrow{t}SO_2\)
\(n_{O_2}=1,5\left(mol\right)\Rightarrow n_S=1,5\left(mol\right)\Rightarrow m_S=48\left(g\right)\)
\(d,PTHH:4P+5O_2\underrightarrow{t}2P_2O_5\)
\(n_{O_2}=1,5\left(mol\right)\Rightarrow n_P=1,2\left(mol\right)\Rightarrow m_P=37,2\left(g\right)\)
\(7,n_{O_2}=5\left(mol\right)\Rightarrow V_{O_2}=112\left(l\right)\left(đktc\right)\);\(V_{O_2}=120\left(l\right)\left(đkt\right)\)
\(8,PTHH:C+O_2\underrightarrow{t}CO_2\)
\(m_C=0,96\left(kg\right)\Rightarrow n_C=0,08\left(kmol\right)=80\left(mol\right)\Rightarrow n_{O_2}=80\left(mol\right)\Rightarrow V_{O_2}=1792\left(l\right)\)
\(9,n_p=0,2\left(mol\right);n_{O_2}=0,3\left(mol\right)\)
\(PTHH:4P+5O_2\underrightarrow{t}2P_2O_5\)
Vì\(\frac{0,2}{4}< \frac{0,3}{5}\)nên P hết O2 dư, bài toán tính theo P.
\(a,n_{O_2}\left(dư\right)=0,05\left(mol\right)\Rightarrow m_{O_2}\left(dư\right)=1,6\left(g\right)\)
\(b,n_{P_2O_5}=0,1\left(mol\right)\Rightarrow m_{P_2O_5}=14,2\left(g\right)\)
a) PTHH:
4FeS2 + 11O2 \(\rightarrow\) 2Fe2O3 + 8SO2
b)
ta có lượng FeS2 nguyên chất : mFeS2 = \(\dfrac{250.96}{100}=240\left(g\right)\)
=> nFeS2 = \(\dfrac{240}{120}=2\left(mol\right)\)
thể tích khí sunfuro thu được là :
VO2 = \(\dfrac{2.8}{4}.22,4=89,6\left(l\right)\)
c) Fe2O3 : oxit bazo
SO2 : oxit axit
a) mFeS2 sao khi loại bỏ tạp chất = 250 . (100% - 4%) = 240 (g)
=> nFeS2 = \(\frac{240}{120}=2\) mol
Pt: 4FeS2 + 11O2 --to--> 2Fe2O3 + 8SO2
.......2 mol----------------------------> 4 mol
b) VSO2 = 4 . 22,4 = 89,6 (lít)
c) Fe2O3 : oxit bazơ
.....SO2 : oxit axit