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\(n_{Cl_2}=\dfrac{11.2}{22.4}=0.5\left(mol\right)\)
\(2KMnO_4+16HCl_{\left(đ\right)}\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
\(0.2...................1.6...........................................0.5\)
\(m_{KMnO_4}=0.2\cdot158=31.6\left(g\right)\)
\(V_{dd_{HCl}}=\dfrac{1.6}{1}=1.6\left(l\right)=1600\left(ml\right)\)
\(n_{Cl_2}=\dfrac{11,2}{22,4}=0,5(mol)\\ PTHH:2KMnO_4+16HCl\to 2KCl+2MnCl_2+5Cl_2+8H_2O\\ \Rightarrow n_{KMnO_4}=\dfrac{2}{5}n_{Cl_2}=0,2(mol);n_{HCl}=\dfrac{16}{5}n_{Cl_2}=1,6(mol)\\ \Rightarrow m_{KMnO_4}=0,2.158=31,6(g);V_{dd_{HCl}}=\dfrac{1,6}{1}=1,6(l)=1600(ml)\)
2Fe+ 3Cl2=(t0) 2FeCl3
nFeCl3=16,25/162,5=0,1 mol => nCl2=3/2nFeCl3=3/2.0,1=0,15 mol
2KMnO4+ 16HCl=2KCl+2MnCl2+5Cl2+8H2O
nKMnO4=2/5.nCl2=2/5. 0,15=0,06 mol --> mKMnO4=0.06. 158=9,48 g
nHCl=16/5. nCl2=16/5. 0,15=0,48 mol
--> VddHCl=0,48/ 1=0,48 lit= 480 ml
Phương trình hóa học của phản ứng:
3Cl2 + 2Fe → 2FeCl3
Theo pt: 
2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O
Theo pt:
mKMnO4 cần = 0,06. 158 = 9,48g
2Al+6HCl->2AlCl3+3H2
0,5----1,5-------------------------0,75
n H2=0,075 mol
cần 10 quả bóng =>0,075.10=0,75 mol
=>mAl=0,5.27=13,5g
m HCl=1,5.36,5=54,75g
=>m dd=75g
\(n_{H_2}=\dfrac{1,68}{22,4}=0,075\left(mol\right)\\
pthh:2Al+6HCl\rightarrow2AlCl_3+3H_2\)
0,1125 0,15 0,075
\(m_{Al}=0,1125.27=3,0375\left(g\right)\\
m_{HCl}=\dfrac{\left(0,15.36,5\right).100}{7,3}=75\left(g\right)\)
\(n_{FeCl_3}=\dfrac{16.25}{162.5}=0.1\left(mol\right)\)
\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{t^0}FeCl_3\)
\(......0.15......0.1\)
\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
\(0.06...............0.48........................................0.15\)
\(m_{KMnO_4}=0.06\cdot158=9.48\left(g\right)\)
\(V_{dd_{HCl}}=\dfrac{0.48}{1}=0.48\left(l\right)=480\left(ml\right)\)
\(2Fe+ 3Cl_2 \xrightarrow{t^o} 2FeCl_3\\ n_{Cl_2} = \dfrac{3}{2}n_{FeCl_3} = \dfrac{3}{2}.\dfrac{16,25}{162,5} = 0,15(mol)\\ 2KMnO_4 + 16HCl \to 2KCl + 2MnCl_2 + 5Cl_2 + 8H_2O\\ n_{KMnO_4} = \dfrac{2}{5}n_{Cl_2} = 0,06(mol)\\ \Rightarrow m_{KMnO_4} = 0,06.158 = 9,48(gam)\\ n_{HCl} = \dfrac{16}{4}n_{Cl_2} = 0,48(mol)\\ \Rightarrow V_{dd\ HCl} = \dfrac{0,48}{1} = 0,48(lít) = 480(ml)\)
nAl=16,2/27= 0,6(mol)
a) PTHH: 4 Al +3 O2 -to-> 2 Al2O3
nO2= 3/4 . nAl=3/4 . 0,6= 0,45(mol)
=> V(O2,đktc)=0,45 x 22,4=10,08(l)
b) nAl2O3= nAl/2=0,6/2=0,3(mol)
=>mAl2O3=102. 0,3= 30,6(g)
c) 2KMnO4 -to-> K2MnO4 + MnO2 + O2
nKMnO4= 2.nO2=2. 0,45=0,9(mol)
=>mKMnO4= 158 x 0,9= 142,2(g)
1. 2Al+3Cl2\(\rightarrow\)2AlCl3
nAlCl3=\(\frac{26,7}{133,5}\)=0,2
\(\rightarrow\)nAl=0,2\(\rightarrow\)mAl=0,2.27=5,4
\(\rightarrow\)nCl2=0,3\(\rightarrow\)VCl2=0,3.22,4=6,72l
2. 2KMnO4+16HCl\(\rightarrow\)2KCl+2MnCl2+5Cl2+8H2O
nFeCl3=\(\frac{16,25}{162,5}\)=0,1
2Fe+3Cl2\(\rightarrow\)2FeCl3
\(\rightarrow\)nCl2=0,1.1,5=0,15
\(\rightarrow\)nKMnO4=\(\frac{0,15.2}{5}\)=0,06
\(\rightarrow\)mKMnO4=0,06.158=9,48
\(\rightarrow\)nHCl=0,48
\(\rightarrow\)VddHCl=0,48l=480ml