\(n_{Fe_2O_3}=\dfrac{10}{160}=0,0625\left(mol\right)\\ n_{HCl}=\dfrac{200.18,25\%}{36,5}=1\left(mol\right)\\ Fe_2O_3+6HCl\xrightarrow[]{}2FeCl_3+3H_2O\\ TC:\dfrac{0,0625}{1}< \dfrac{1}{6}\Rightarrow HCl.dư\\ n_{FeCl_3}=0,0625.2=0,125\left(mol\right)\\ n_{HCl}=0,0625.6=0,375\left(mol\right)\\ m_{dd}=10+200=210\left(g\right)\\ C_{\%FeCl_3}=\dfrac{0,125.162,5}{210}\cdot100\approx9,67\%\\ C_{\%HCl\left(dư\right)}=\dfrac{\left(1-0,375\right).36,5}{210}\cdot100\approx10,86\%\)