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a, \(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)
\(n_{H2}=\frac{3,36}{22,4}=0,15\left(mol\right)\)
\(\Rightarrow n_{Fe2O3}=\frac{1}{3}n_{H2}=0,05\left(mol\right)\)
\(\Rightarrow m_{Fe2O3}=0,05.160=8\left(g\right)\)
b, \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(\Rightarrow n_{AlCl3}=\frac{2}{3}n_{H2}=0,1\left(mol\right)\)
\(\Rightarrow m_{AlCl3}=0,1.133,5=13,35\left(g\right)\)
\(PTHH:2Al+6HCl\rightarrow2AlCl_3+3H_2\)
Ta có:
\(n_{Al}=\frac{5,4}{27}=0,2\left(mol\right)\)
\(\Rightarrow n_{H2}=\frac{3}{2}n_{Al}=0,3\left(mol\right)\)
\(\Rightarrow V_{H2}=0,3.22,4=6,72\left(l\right)\)
\(n_{AlCl3}=n_{Al}=0,2\left(mol\right)\)
\(\Rightarrow m_{AlCl3}=0,2.133,5=26,7\left(g\right)\)
a) \(n_{H2}=\frac{3,36}{22,4}=0,15\left(mol\right)\)
PTHH: Fe2O3 + 3H2 --> 2Fe + 3H2O
______ 0,05 <---- 0,15 ---> 0,1______ (mol)
=> \(m_{Fe2O3}=0,05.160=8\left(g\right)\)
b) \(m_{Fe}=0,1.56=5,6\left(g\right)\)
\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\\ 2Fe+3Cl_2\rightarrow\left(t^o\right)2FeCl_3\\ n_{Cl_2}=\dfrac{3}{2}.0,2=0,3\left(mol\right)\\ n_{FeCl_3}=n_{Fe}=0,2\left(mol\right)\\ a,V_{Cl_2\left(đktc\right)}=0,3.22,4=6,72\left(l\right)\\ b,m_{FeCl_3}=162,5.0,2=32,5\left(g\right)\)
a, \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
PT: \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
Theo PT: \(n_{Cl_2}=\dfrac{3}{2}n_{Fe}=0,3\left(mol\right)\)
\(\Rightarrow V_{Cl_2}=0,3.22,4=6,72\left(l\right)\)
b, \(n_{FeCl_3}=n_{Fe}=0,2\left(mol\right)\Rightarrow m_{FeCl_3}=0,2.162,5=32,5\left(g\right)\)
\(n_{Fe}=\dfrac{5.6}{56}=0.1\left(mol\right)\)
\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{^{^{t^0}}}FeCl_3\)
\(0.1.......0.15..........0.1\)
\(V_{Cl_2}=0.15\cdot22.4=3.36\left(l\right)\)
\(m_{FeCl_3}=0.1\cdot162.5=16.25\left(g\right)\)
a.b.\(n_{Fe_2O_3}=\dfrac{m_{Fe_2O_3}}{M_{Fe_2O_3}}=\dfrac{16}{160}=0,1mol\)
\(n_{H_2}=\dfrac{V_{H_2}}{22,4}=\dfrac{13,44}{22,4}=0,6mol\)
\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)
0,1 < 0,6 ( mol )
0,1 0,3 0,2 ( mol )
\(m_{Fe}=n_{Fe}.M_{Fe}=0,2.56=11,2g\)
c.\(n_{H_2}=0,6-0,3=0,3mol\)
\(CuO+H_2\rightarrow Cu+H_2O\)
0,3 0,3 ( mol )
\(m_{CuO}=n_{CuO}.M_{CuO}=0,3.80=24g\)
thanks
bn ơi cho mik hỏi ngay chỗ pt ở dưới t độ chữ Mno2 là j vậy bn
nH2= \(\frac{3,36}{22,4}\)=0,15 (mol)
a. PTHH: Fe2O3 + 3H2 ➜ 2Fe + 3H2O
➞ nFe2O3= 0,15 x 1 : 3 = 0,05 (mol)
➞mFe2O3= 0,05 x 160 = 8 (g)
Bạn xem lại câu b nhé.
Chúc bạn học tốt UwU
thanks