m C l = m A l C l 3 - m A l = 6,675 - 1,35 = 5,325 g

n C l = 3 . n A l  ⇒ số nguyên tử Cl gấp 3 số nguyên tử Al. Công thức hóa học đơn giản của nhôm clorua: A l C l 3

\(PTHH:2Al+3Cl_2\) → \(2AlCl_3\)

\(n_{Al}=\dfrac{m}{M}=\dfrac{1,35}{27}=0,05\left(mol\right)\)

Theo PTHH

⇒ \(n_{Cl_2}=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}.0,05=0,075\left(mol\right)\)

⇒ \(V_{Cl_2\left(đktc\right)}=n.22,4=0,075.22,4=1,68\left(l\right)\)

a) 2Al + 3Cl₂ --t^o--> 2AlCl₃

b) \(n_{AlCl_3}=\dfrac{13,35}{133,5}=0,1\left(mol\right)\)

PTHH: 2Al + 3Cl₂ --t^o--> 2AlCl₃

            0,1<-0,15<---------0,1

=> V_Cl2 = 0,15.22,4 = 3,36(l)

c) m_Al = 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) $2Al + 3Cl_2 \xrightarrow{t^o} 2AlCl_3$
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) $n_{AlCl_3} = n_{Al} = 0,2(mol)$
$\Rightarrow m_{AlCl_3} = 0,2.133,5 = 26,7(gam)$

nAl = 2,7/27 = 0,1 (mol)

PTHH: 2Al + 3Cl2 -> (t°) 2AlCl3

Mol: 0,1 ---> 0,15 ---> 0,1

VCl2 = 0,15 . 22,4 = 3,36 (l)

mAlCl3 = 0,1 . 133,5 = 13,35 (g)

a/

2Al+3Cl2 --(t^o)--> 2AlCl3

\(nAl=\dfrac{2,7}{27}=0,1\left(mol\right)\)

=> \(nCl_2=\dfrac{3}{2}.0,1=0,15\left(mol\right)\)

\(VCl_2=0,15.22,4=3,36\left(lít\right)\)

c, \(nAlCl_3=nAl=0,1\left(mol\right)\)

\(mAlCl_3=0,1.133,5=13,35\left(g\right)\)

a)

\(PTHH:2Al+6HCl->2AlCl_3+3H_2\)

                 1,3<---4<-------1,3<---------2                      

b)

\(n_{H_2\left(dktc\right)}=\dfrac{V}{22,4}=\dfrac{44,8}{22,4}=2\left(mol\right)\)

\(m_{AlCl_3}=n\cdot M=1,3\cdot\left(27+35,5\cdot3\right)=173,55\left(g\right)\)

\(m_{Al}=n\cdot M=1,3\cdot27=35,1\left(g\right)\)

\(n_{Al}=\frac{1,08}{27}=0,04mol\)

\(2Al+3Cl_2\rightarrow^{t^o}2AlCl_3\)

a) \(n_{Cl_2}=\frac{3}{2}.0,04=0,06mol\)

\(V_{Cl_2}=0,06.22,4=1,344l\)

b) Cách 1: \(m_{AlCl_3}=m_{Al}+m_{Cl_2}=1,08+71.0,06=5,34g\)

Cách 2: \(n_{AlCl_3}=n_{Al}=0,04mol\)

\(m_{AlCl_3}=0,04.133,5=5,34g\)

\(a,2Al+3Cl_2\rightarrow\left(t^o\right)2AlCl_3\\ b,Na_2CO_3+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+2NaOH\\ c,3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)