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a) \(m_{CuO}=\dfrac{20.40}{100}=8\left(g\right)\) => \(n_{CuO}=\dfrac{8}{80}=0,1\left(mol\right)\)
\(m_{Fe_2O_3}=20-8=12\left(g\right)\) => \(n_{Fe_2O_3}=\dfrac{12}{160}=0,075\left(mol\right)\)
PTHH: CuO + H2 --to--> Cu + H2O
0,1--->0,1------>0,1
Fe2O3 + 3H2 --to--> 2Fe + 3H2O
0,075--->0,225----->0,15
=> mCu = 0,1.64 = 6,4 (g)
=> mFe = 0,15.56 = 8,4 (g)
b) \(V_{H_2}=\left(0,1+0,225\right).22,4=7,28\left(l\right)\)
\(n_{Fe_2O_3}=24.75\%=18g\)
\(n_{Fe_2O_3}=\dfrac{18}{160}=0,1125mol\)
\(n_{CuO}=\dfrac{24-18}{80}=0,075mol\)
\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)
0,1125 0,3375 ( mol )
\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)
0,075 0,075 ( mol )
\(V_{H_2}=\left(0,3375+0,075\right).22,4=9,24l\)
\(m_{Fe_2O_3}=16\cdot75\%=12\left(g\right)\)
\(n_{Fe_2O_3}=\dfrac{12}{160}=0.075\left(mol\right)\)
\(n_{CuO}=16\cdot25\%=4\left(g\right)\)
\(n_{CuO}=\dfrac{4}{80}=0.05\left(mol\right)\)
\(Fe_2O_3+3H_2\underrightarrow{^{^{t^0}}}2Fe+3H_2O\)
\(CuO+H_2\underrightarrow{^{^{t^0}}}Cu+H_2O\)
\(n_{H_2}=3\cdot0.075+0.05=0.275\left(mol\right)\)
a,\(m_{Fe_2O_3}=16.75\%=12\left(g\right)\Rightarrow n_{Fe_2O_3}=\dfrac{12}{160}=0,075\left(mol\right)\)
\(m_{CuO}=16-12=4\left(g\right)\Rightarrow n_{CuO}=\dfrac{4}{80}=0,05\left(mol\right)\)
PTHH: Fe2O3 + 3H2 → 2Fe + 3H2O
Mol: 0,075 0,225 0,15
PTHH: CuO + H2 → Cu + H2O
Mol: 0,05 0,05 0,05
\(\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right);m_{Cu}=0,05.64=3,2\left(g\right)\)
b,\(n_{H_2}=0,225+0,05=0,275\left(mol\right)\)
PTHH của phản ứng là:
Từ pt (1), ta có: n C u = n C u O = 0,05 mol
m C u = 0,05.64 = 3,2(g)
Từ pt (2), ta có n F e = 2 . n F e 2 O 3 = 2. 0,075 = 0,15 mol
m F e = 0,15.56 = 8,4(g)
\(a) CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ Fe_2O_3 + 3H_2 \xrightarrow{t^o} 2Fe + 3H_2O\\ b) n_{CuO} = \dfrac{32.25\%}{80} = 0,1(mol)\\ n_{Fe_2O_3} = \dfrac{32-0,1.80}{160} = 0,15(mol)\\ n_{Cu} = n_{CuO} = 0,1(mol) \Rightarrow m_{Cu} = 0,1.64 = 6,4(gam)\\ n_{Fe} = 2n_{Fe_2O_3} = 0,3(mol) \Rightarrow m_{Fe} = 0,3.56 = 16,8(gam)\)
a, mFe2O3 = 32 . 75% = 24 (g)
nFe2O3 = 24/160 = 0,15 (mol)
mCuO = 32 - 24 = 8 (g)
nCuO = 8/80 = 0,1 (mol)
PTHH:
Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O
0,15 ---> 0,45 ---> 0,3
CuO + H2 -> (t°) Cu + H2O
0,1 ---> 0,1 ---> 0,1
mFe = 0,3 . 56 = 16,8 (g)
mCu = 64 . 0,1 = 6,4 (g)
b, nH2 = 0,1 + 0,45 = 0,55 (mol)
VH2 = 0,55 . 22,4 = 12,32 (l)
c, PTHH:
2Al + 6HCl -> 2AlCl3 + 3H2
11/30 <--- 1,1 <--- 11/30 <--- 0,55
mAl = 11/30 . 27 = 9,9 (g)
mHCl = 1,1 . 36,5 = 40,15 (g)
\(a)Gọi : n_{CuO} = x(mol) \Rightarrow n_{Fe_2O_3} = \dfrac{80a.2}{160}=x(mol)\\ CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ Fe_2O_3 + 3H_2 \xrightarrow{t^o} 2Fe + H_2O\\ n_{H_2} = x + x = \dfrac{8,96}{22,4} = 0,4(mol)\Rightarrow x = 0,2\\ a = 0,2.80 + 0,2.160 = 48(gam)\\ b)\\ n_{Fe} = 2n_{Fe_2O_3} = 0,4(mol) \Rightarrow m_{Fe} = 0,4.56 = 22,4(gam)\\ n_{Cu} = n_{CuO} = 0,2(mol) \Rightarrow m_{Cu} = 0,2.64 = 12,8(gam)\)
Ta có:
\(\left\{{}\begin{matrix}m_{CuO}=\frac{24.33,34}{100}=8\left(g\right)\\n_{Cu}=\frac{8}{80}=0,1\left(mol\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}m_{Fe2O3}=24-8=16\left(g\right)\\n_{Fe2O3}=\frac{16}{160}=0,1\left(mol\right)\end{matrix}\right.\)
\(CuO+H_2\rightarrow Cu+H_2O\)
0,1_____________0,1_________
\(m_{Cu}=0,1.64=6,4\left(g\right)\)
\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)
0,1____________0,2____________
\(\Rightarrow m_{Fe}=0,2.56=11,2\left(g\right)\)
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