PT: \(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
Giả sử: \(\left\{{}\begin{matrix}n_{CuO}=x\left(mol\right)\\n_{Fe_2O_3}=y\left(mol\right)\end{matrix}\right.\)
Ta có: \(n_{HCl}=0,1.5=0,5\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{CuO}+6n_{Fe_2O_3}=2x+6y\left(mol\right)\) ⇒ 2x + 6y = 0,5 (1)
\(\left\{{}\begin{matrix}n_{CuCl_2}=n_{CuO}=x\left(mol\right)\\n_{FeCl_3}=2n_{Fe_2O_3}=2y\left(mol\right)\end{matrix}\right.\)
Mà: nCuCl2 : nFeCl3 = 1:1
⇒ x - 2y = 0 (2)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,1\left(mol\right)\\y=0,05\left(mol\right)\end{matrix}\right.\)
⇒ a = mCuO + mFe2O3 = 0,1.80 + 0,05.160 = 16 (g)
Bạn tham khảo nhé!
\(n_{CuCl_2}=n_{FeCl_3}=a\left(mol\right)\)
\(n_{HCl}=0.1\cdot5=0.5\left(mol\right)\)
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
\(n_{HCl}=2a+3a=0.5\left(mol\right)\)
\(\Rightarrow a=0.1\)
\(m_{hh}=0.1\cdot80+0.05\cdot160=16\left(g\right)\)
