Fe + CuSO4 → FeSO4 + Cu
a) \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
\(n_{CuSO_4}=0,1\times1=0,1\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{CuSO_4}\)
Theo bài: \(n_{Fe}=2n_{CuSO_4}\)
Vì \(2>1\) ⇒ Fe dư
Theo PT: \(n_{Fe}pư=n_{CuSO_4}=0,1\left(mol\right)\)
\(\Rightarrow n_{Fe}dư=0,2-0,1=0,1\left(mol\right)\)
\(\Rightarrow m_{Fe}dư=0,1\times56=5,6\left(g\right)\)
b) Theo PT: \(n_{FeSO_4}=n_{CuSO_4}=0,1\left(mol\right)\)
\(\Rightarrow m_{FeSO_4}=0,1\times152=15,2\left(g\right)\)
c) Theo PT: \(n_{Cu}=n_{CuSO_4}=0,1\left(mol\right)\)
\(\Rightarrow m_{Cu}=0,1\times64=6,4\left(g\right)\)