a) PTHH: 2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2\(\uparrow\)
b) nAl = \(\frac{2,4}{27}\approx0,9\)(mol)
Theo PT: n\(H_2\) = \(\frac{3}{2}n_{Al}=\frac{3}{2}.0,9=1,35\left(mol\right)\)
=> V\(H_2\) = 1,35.22,4 = 30,24 (l)
c) PTHH: H2 + CuO \(\underrightarrow{t^o}\) Cu + H2O
Theo PT: nCuO = n\(H_2\) = 1,35 (mol)
=> mCuO = 1,35.80 = 108 (g)
a) PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\left(1\right)\)
b) \(n_{Al}=\frac{2,4}{27}\approx0,9\left(mol\right)\)
Theo PTHH (1): \(n_{Al}:n_{H_2}=2:3\)
\(\Rightarrow n_{H_2}=n_{Al}.\frac{3}{2}=0,9.\frac{3}{2}=1,35\left(mol\right)\)
\(\Rightarrow V_{H_2\left(đktc\right)}=1,35.22,4=30,24\left(l\right)\)
c) PTHH: \(CuO+H_2\underrightarrow{t^0}Cu+H_2O\left(2\right)\)
Theo PTHH (2): \(n_{H_2}:n_{CuO}=1:1\)
\(\Rightarrow n_{H_2}=n_{CuO}=1,35\left(mol\right)\)
\(\Rightarrow m_{CuO}=1,35.80=108\left(g\right)\)
Số mol Al là: \(n_{Al}=\frac{m}{M}=\frac{2,4}{27}=0,0\left(8\right)\left(mol\right)\)
a. \(PTHH:2Al+6HCl\rightarrow2AlCl_3+3H_2\)
(mol) 2 3
(mol) \(0,0\left(8\right)\) \(0,1\left(3\right)\)
b. Thể tích khí hidro thu được là:
\(V_{H_2}=n.22,4=0,1\left(3\right).22,4=2,98\left(6\right)\left(l\right)\)
c. \(PTHH:CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
(mol) 1 1
(mol) \(0,1\left(3\right)\) \(0,1\left(3\right)\)
Số gam đồng (II) oxit bị khử là:
\(m_{CuO}=n.M=0,1\left(3\right).80=10,\left(6\right)\left(g\right)\)