\(a,PTHH:Fe+CuSO_4\rightarrow FeSO_4+Cu\\ b,n_{Fe}=\dfrac{1,96}{56}=0,035\left(mol\right)\\ \Rightarrow n_{CuSO_4}=0,035\left(mol\right)\\ \Rightarrow m_{CT_{CuSO_4}}=0,035\cdot160=5,6\left(g\right)\\ \Rightarrow m_{dd_{CuSO_4}}=\dfrac{5,6\cdot100\%}{10\%}=56\left(g\right)\\ c,n_{FeSO_4}=n_{Cu}=n_{Fe}=0,035\left(mol\right)\\ \Rightarrow\left\{{}\begin{matrix}m_{CT_{FeSO_4}}=0,035\cdot152=5,32\left(g\right)\\m_{Cu}=0,035\cdot64=2,24\left(g\right)\end{matrix}\right.\\ \Rightarrow m_{dd_{FeSO_4}}=1,96+56-2,24=55,72\left(g\right)\\ \Rightarrow C\%_{FeSO_4}=\dfrac{5,32}{55,72}\cdot100\%\approx9,55\%\)