a, \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

b, \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

Theo PT: \(n_{H_2}=\dfrac{3}{2}n_{Al}=0,3\left(mol\right)\Rightarrow V_{H_2}=0,3.22,4=6,72\left(l\right)\)

c, \(n_{AlCl_3}=n_{Al}=0,2\left(mol\right)\Rightarrow m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)

2Al  +  6HCl   →  2AlCl₃  +  3H₂

nAl = \(\dfrac{3,375}{27}\)= 0,125 mol

a) Theo tỉ lệ phản ứng => nH₂ = \(\dfrac{3}{2}\)nAl = 0,1875 mol

<=> V H₂ = 0,1875.22,4 = 4,2 lít

b) nAlCl₃ = nAl = 0,125 mol

=> mAlCl₃ = 0,125 . 133,5 = 16,6875 gam

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

 \(m_{HCl}=109,5.10\%=10,95\left(g\right)\Rightarrow n_{HCl}=\dfrac{10,95}{36,5}=0,3\left(mol\right)\)

PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂

Mol:      0,1      0,3         0,1       0,15

Ta có: \(\dfrac{0,1}{2}=\dfrac{0,3}{6}\) ⇒ Al hết, HCl hết

\(V_{H_2}=0,15.22,4=3,36\left(l\right)\)

b, \(m_{AlCl_3}=0,1.133,5=13,35\left(g\right)\)

c, m_{dd sau pứ} = 2,7 + 109,5 - 0,15.2 = 111,9 (g)

\(C\%_{ddAlCl_3}=\dfrac{13,35.100\%}{111,9}=11,93\%\)

PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)

Ta có: \(\left\{{}\begin{matrix}n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\\n_{HCl}=\dfrac{109,5\cdot10\%}{36,5}=0,3\left(mol\right)\end{matrix}\right.\)

Xét tỉ lệ: \(\dfrac{0,1}{2}=\dfrac{0,3}{6}\) \(\Rightarrow\) Al và HCl đều p/ứ hết

\(\Rightarrow\left\{{}\begin{matrix}n_{AlCl_3}=0,1\left(mol\right)\\n_{H_2}=0,15\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{AlCl_3}=0,1\cdot133,5=13,35\left(g\right)\\V_{H_2}=0,15\cdot22,4=3,36\left(l\right)\\m_{H_2}=0,15\cdot2=0,3\left(g\right)\end{matrix}\right.\)

Mặt khác: \(m_{dd}=m_{Al}+m_{ddHCl}-m_{H_2}=111,9\left(g\right)\)

\(\Rightarrow C\%_{AlCl_3}=\dfrac{13,35}{111,9}\cdot100\%\approx11,93\%\)

\(n_{HCl}=\dfrac{150.7,3\%}{36,5}=0,3\left(mol\right)\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\\ a,n_{Al}=n_{AlCl_3}=\dfrac{2}{6}.0,3=0,1\left(mol\right)\\ \Rightarrow m_{Al}=0,1.27=2,7\left(g\right)\\ b,m_{AlCl_3}=0,1.133,5=13,35\left(g\right)\\ c,n_{H_2}=\dfrac{3}{6}.0,3=0,15\left(mol\right)\\ \Rightarrow V_{H_2\left(đktc\right)}=0,15.22,4=3,36\left(l\right)\)

nHCl=150.7,3%36,5=0,3(mol)2Al+6HCl→2AlCl3+3H2↑a,nAl=nAlCl3=26.0,3=0,1(mol)⇒mAl=0,1.27=2,7(g)b,mAlCl3=0,1.133,5=13,35(g)c,nH2=

a) PTHH:

2Al + 6HCl \(\rightarrow\) 2AlCl₃ + 3H₂

b) Số mol Al tham gia phản ứng là:

5,4 : 27 = 0,2 (mol)

Theo PTHH, số mol AlCl₃ sinh ra là 0,2 (mol).

Khối lượng AlCl₃ sinh ra là:

0,2 (27 + 35,5.3) = 26,7 (g)

Theo PTHH, số mol H₂ sinh ra là:

0,2 : 2 . 3 = 0,3 (mol)

Thể tích H₂ sinh ra là:

0,3 . 22,4 = 6,72 (l)

a) PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂↑

b)\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

Theo PTHH ta có:

\(n_{AlCl_3}=n_{Al}=0,2\left(mol\right)\Rightarrow m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)

\(n_{H_2}=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}.0,2=0,3\left(mol\right)\Rightarrow V_{H_2}=0,3.22,4=6,72\left(l\right)\)

a) PTHH: 2Al + 6HCl----> 2AlCl3+ 3H2

b) nAl=5,4:27=0,2mol

theo PTHH cứ 2 mol Al cần 2 mol AlCl3

0,2 mol Al cần 0,2 mol AlCl3

mAlCl3=0,2.133,5=26,7g

theo PTHH cứ 2 mol Al tạo thành 3 mol H2

0,2 mol Al tạo thành 0,3 mol H2

VH2= 0,3.22,4=6,72(l)

n Al=0,25 mol

2Al + 6HCl → 2AlCl₃ + 3H₂

0,25---0,75------0,25------0,375 mol

=>VH2=0,375.22,4=8,4l

=>m AlCl3=0,25.133,5=33,375g

=>CM HCl=\(\dfrac{0,75}{2}\)=0,375M

\(MgCO_3+2HCl\rightarrow MgCl_2+H_2O+CO_2\)

\(CO_2+Na\left(OH\right)_2\rightarrow CaCO_3+H_2O\)

b. \(n_{MgCO_3}=\dfrac{21}{84}=0,25mol\) \(\Rightarrow n_{HCl}=2.0,25=0,5mol\)

\(V_{ddHCl}=\dfrac{0,5}{2}=0,25l\)

c. \(n_{CO_2}=n_{MgCO_3}=0,25mol\)

\(n_{CaCO_3}=n_{CO_2}=0,25mol\)

\(\Rightarrow m_{CaCO_3}=0,25.100=25g\)

asd

\(m_{ct}=\dfrac{7,3.300}{100}=21,9\left(g\right)\)

\(n_{HCl}=\dfrac{21,9}{36,5}=0,6\left(mol\right)\)

Pt : \(2Al+6HCl\rightarrow2AlCl_3+3H_2|\)

        2          6              2            3

       0,2      0,6            0,2         0,3

a) \(n_{Al}=\dfrac{0,6.2}{6}=0,2\left(mol\right)\)

⇒ \(m_{Al}=0,2.27=5,4\left(g\right)\)

b) \(n_{AlCl3}=\dfrac{0,6.2}{6}=0,2\left(mol\right)\)

⇒ \(m_{AlCl3}=0,2.133,5=26,7\left(g\right)\)

c) \(n_{H2}=\dfrac{0,2.3}{2}=0,3\left(mol\right)\)

\(V_{H2\left(dktc\right)}=0,3.22,4=6,72\left(l\right)\)

d) \(m_{ddspu}=5,4+300-\left(0,3.2\right)=304,8\left(g\right)\)

\(C_{AlCl3}=\dfrac{26,7.100}{304,8}=8,76\)⁰/₀

 Chúc bạn học tốt

\(n_{Al}=\dfrac{10,8}{27}=0,4\left(mol\right)\)

PTHH :

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)

0,4      1,2           0,4         0,6 

\(a,V_{H_2}=0,6.22,4=13,44\left(l\right)\)

\(b,m_{HCl}=1,2.36,5=43,8\left(g\right)\)

\(c,m_{AlCl_3}=133,5.0,4=53,4\left(g\right)\)

\(m_{ddHCl}=\dfrac{43,8.100}{10}=438\left(g\right)\)

\(m_{ddAlCl_3}=10,8+438-\left(0,6.2\right)=447,6\left(g\right)\)

\(C\%=\dfrac{53,8}{447,6}.100\%\approx12,02\%\)