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\(n_{Al}=\dfrac{8,1}{27}=0,3\left(mol\right)\)
PTHH: 2Al + 6HCl ---> 2AlCl3 + 3H2
0,3 ---------------> 0,3 -----> 0,45
\(\rightarrow\left\{{}\begin{matrix}V_{H_2}=0,45.22,4=10,08\left(l\right)\\m_{AlCl_3}=0,3.133,5=40,05\left(g\right)\end{matrix}\right.\)
a) \(2Al + 6HC l\to 2AlCl_3 + 3H_2\)
b)
\(n_{Al} = \dfrac{5,4}{27} = 0,2(mol)\\ \Rightarrow n_{H_2} = \dfrac{3}{2}n_{Al} = 0,3(mol)\\ \Rightarrow V_{H_2} = 0,3.22,4 = 6,72(lít)\\ c) n_{AlCl_3} = n_{Al} = 0,2(mol)\\ m_{AlCl_3} = 0,2.133,5 = 26,7(gam)\)
a) PTHH : 2Al+6HCl → 2AlCl3 + 3H2
b)Ta có : mAl=5,4(g)→ nAl=0,2(mol)
PTHH : 2Al+6HCl → 2AlCl3 + 3H2
2 6 2 3
0,2 0,6 0,2 0,3 (mol)
VH2= 0,3 . 22,4=6,72(l)
c) mAlCl3= 0,2 . 133,5=26,7(g)
a) \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
TPT: 1 1 (mol)
TĐB: 0,1 0,1 (mol)
\(n_{Zn}=\dfrac{m}{M}=\dfrac{6,5}{65}=0,1\left(mol\right)\)
b)
\(V_{H_2}=n.22,4=0,1.22,4=2,24\left(l\right)\)
1. \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
2. \(n_{Al}=\dfrac{8,1}{27}=0,3\left(mol\right)\)
\(n_{H_2}=\dfrac{3}{2}n_{Al}=0,45\left(mol\right)\Rightarrow V_{H_2}=0,45.22,4=10,08\left(l\right)\)
3. \(n_{AlCl_3}=n_{Al}=0,3\left(mol\right)\)
\(\Rightarrow m_{AlCl_3}=0,3.133,5=40,05\left(g\right)\)
a) \(n_{Zn}=\dfrac{6,5}{65}=0,1\left(mol\right)\)
PTHH:
Zn + H2SO4(l) ---> ZnSO4 + H2
0,1------------------>0,1------>0,1
b) VH2 = 0,1.24,79 = 2,479 (l)
c) mZnSO4 = 0,1.136 = 13,6 (g)
\(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{5,4}{27}=0,2mol\)
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
0,2 0,2 0,3 ( mol )
\(V_{H_2}=n_{H_2}.22,4=0,3.22,4=6,72l\)
\(m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,2.133,5=26,7g\)
a, PT: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
b, Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
Theo PT: \(\left\{{}\begin{matrix}n_{HCl}=3n_{Al}=0,6\left(mol\right)\\n_{H_2}=\dfrac{3}{2}n_{Al}=0,3\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{HCl}=0,6.36,5=21,9\left(g\right)\)
\(V_{H_2}=0,3.22,4=6,72\left(l\right)\)
c, Cách 1:
Theo PT: \(n_{AlCl_3}=n_{Al}=0,2\left(mol\right)\)
\(\Rightarrow m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)
Cách 2:
Ta có: \(m_{H_2}=0,3.2=0,6\left(g\right)\)
Theo ĐLBT KL, có: mAl + mHCl = mAlCl3 + mH2
⇒ mAlCl3 = mAl + mHCl - mH2 = 5,4 + 21,9 - 0,6 = 26,7 (g)
Bạn tham khảo nhé!
\(n_{Al}=\dfrac{5,4}{27}=0,2mol\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
0,2 0,1 0,3 ( mol )
\(m_{Al_2\left(SO_4\right)_3}=0,1.342=34,2g\)
\(V_{H_2}=0,3.22,4=6,72l\)