$n_{CuSO_4} = \dfrac{80}{160} = 0,5(mol)$
$CuSO_4 + 2NaOH \to Cu(OH)_2 + Na_2SO_4$
$Cu(OH)_2 \xrightarrow{t^o} CuO + H_2O$
Theo PTHH :
$n_{CuO} = n_{CuSO_4} = 0,5(mol)$
$m_{CuO} = 0,5.80 = 40(gam)$
$n_{NaOH} = 2n_{CuSO_4} = 1(mol)$
$\Rightarrow m_{dd\ NaOH} = \dfrac{1.40}{12\%} = 333,33(gam)$
\(n_{CuSO_4}=\dfrac{80}{160}=0,5\left(mol\right)\)
\(CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)
\(Cu\left(OH\right)_2-^{t^o}\rightarrow CuO+H_2O\)
Bảo toàn nguyên tố Cu : \(n_{CuO}=n_{CuSO_4}=0,5\left(mol\right)\)
=> \(m_{CuO}=0,5.80=40\left(g\right)\)
\(m_{ddNaOH}=\dfrac{0,5.2.40}{12\%}=333,3\left(g\right)\)