PTHH : \(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
\(m_{H_2SO_4}=\frac{C\%.m_{dd}}{100\%}=\frac{20.196}{100}=39,2\left(g\right)\)
=> \(n_{H_2SO_4}=\frac{m}{M}=\frac{39,2}{98}=0,4\left(mol\right)\)
- Theo PTHH : \(n_{Fe_2O_3}=\frac{1}{3}n_{H_2SO_4}=\frac{4}{30}\left(mol\right)\)
=> \(m_{Fe_2O_3}=n.M=\frac{64}{3}\left(g\right)\)
Ta có : \(m_{hh}=m_{Cu}+m_{Fe_2O_3}\)
=> \(m_{Cu}=\frac{8}{3}\left(g\right)\)
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