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a) $2Al + 3Cl_2 \xrightarrow{t^o} 2AlCl_3$
b) $n_{Al} = \dfrac{5,4}{27} = 0,2(mol)$
Theo PTHH : $n_{Cl_2} = \dfrac{3}{2}n_{Al} = 0,3(mol)$
$\Rightarrow V_{Cl_2} = 0,3.24,79 = 7,437(lít)$
c) $n_{AlCl_3} = n_{Al} = 0,2(mol)$
$\Rightarrow m_{AlCl_3} = 0,2.133,5 = 26,7(gam)$
a, PT: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
Ta có: \(n_{H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{H_2}=0,6\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,6.36,5=21,9\left(g\right)\)
b, Theo PT: \(n_{Al}=\dfrac{2}{3}n_{H_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{Al}=0,2.27=5,4\left(g\right)\)
\(PTHH:2Al+6HCl->2AlCl_3+3H_2\)
0,2<--0,6<----------0,2<------0,3 (mol)
\(n_{H_2\left(dktc\right)}=\dfrac{V}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
\(m_{HCl}=n\cdot M=0,6\cdot\left(1+35,5\right)=21,9\left(g\right)\)
\(m_{AlCl_3}=n\cdot M=0,2\cdot\left(27+35,5\cdot3\right)=26,7\left(g\right)\)
a, PT: 2Al+6HCl→2AlCl3+3H2
Ta có: nH2=6,7222,4=0,3(mol)
Theo PT: nHCl=2nH2=0,6(mol)
⇒mHCl=0,6.36,5=21,9(g)
b, Theo PT: nAl=23nH2=0,2(mol)
⇒mAl=0,2.27=5,4(g)
a) 2Al + 3Cl2 --to--> 2AlCl3
b) \(n_{AlCl_3}=\dfrac{13,35}{133,5}=0,1\left(mol\right)\)
PTHH: 2Al + 3Cl2 --to--> 2AlCl3
0,1<-0,15<---------0,1
=> VCl2 = 0,15.22,4 = 3,36(l)
c) mAl = 0,1.27 = 2,7(g)
\(a.PTHH:2Al+3Cl_2\overset{t^o}{--->}2AlCl_3\)
b. Ta có: \(n_{AlCl_3}=\dfrac{13,35}{133,5}=0,1\left(mol\right)\)
Theo PT: \(n_{Cl_2}=\dfrac{3}{2}.n_{AlCl_3}=\dfrac{3}{2}.0,1=0,15\left(mol\right)\)
\(\Rightarrow V_{Cl_2}=0,15.22,4=3,36\left(lít\right)\)
c. Theo PT: \(n_{Al}=n_{AlCl_3}=0,1\left(mol\right)\)
\(\Rightarrow m_{Al}=0,1.27=2,7\left(g\right)\)
a) 2Al + 3Cl2 --> 2AlCl3
b) 2:3:2
c) Số mol nhôm clorua là:
nAlCl3 = mAlCl3:MAlCl3 = 40,05:133,5 = 0,3 (mol)
--> nAl = 0,3 (mol)
Khối lượng nhôm ban đầu:
mAl = nAl.MAl = 0,3.27 = 8,1 (g)
\(a,PTHH:2Al+3Cl_2\xrightarrow{t^o}2AlCl_3\\ n_{AlCl_3}=\dfrac{40,05}{133,5}=0,3(mol)\\ b,\text{Tỉ lệ: }2:3:2\\ c,n_{Al}=n_{AlCl_3}=0,3(mol)\\ \Rightarrow m_{Al}=0,3.27=8,1(g)\)
a) PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(2mol\) \(6mol\) \(2mol\) \(3mol\)
\(0,27\) \(x\) \(y\) \(z\)
b) ta có: \(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{7,3}{27}=0,27\left(mol\right)\)
theo PT: \(n_{Al}=n_{AlCl_3}=0,27\left(mol\right)\)
\(\Rightarrow m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,27.133,5=36,045\left(g\right)\)
c) ta có: \(n_{H_2}=\dfrac{m_{H_2}}{M_{H_2}}=\) \(\dfrac{0,27.3}{2}=0,405\left(mol\right)\)
\(\Rightarrow V_{H_2\left(đktc\right)}=n_{H_2}.22,4=0,405.22,4=9,072\left(l\right)\)
\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
a) 2Al + 6HCl --> 2AlCl3 + 3H2
b) \(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
2Al + 6HCl --> 2AlCl3 + 3H2
\(\dfrac{0,4}{3}\)<--------------------0,2
=> Al dư
\(m_{Al\left(dư\right)}=\left(0,2-\dfrac{0,4}{3}\right).27=1,8\left(g\right)\)
\(2Al+6HCl\to 2AlCl_3+3H_2\\ \Rightarrow \text{Số nguyên tử Al : Số phân tử }HCl=2:6=1:3 \)
a) 2Al + 3Cl2 \(\underrightarrow{to}\) 2AlCl3
Tỉ lệ: 2 : 3 : 2
b) \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
theo PT: \(n_{Cl_2}=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}\times0,2=0,3\left(mol\right)\)
\(\Rightarrow V_{Cl_2}=0,3\times22,4=6,72\left(l\right)\)
c) Theo PT: \(n_{AlCl_3}=n_{Al}=0,2\left(mol\right)\)
\(\Rightarrow m_{AlCl_3}=0,2\times133,5=26,7\left(g\right)\)
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