\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)
\(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)
Theo PT: \(n_{CuO}=n_{Cu\left(OH\right)_2}=n_{CuCl_2}=\dfrac{4,05}{135}=0,03\left(mol\right)\)
\(\Rightarrow m_E=m_{CuO}=0,03.80=2,4\left(g\right)\)
\(n_{CuCl_2}=\dfrac{4,05}{135}=0,03\left(mol\right)\)
PTHH:
\(CuCl_2+2NaOH\rightarrow2NaCl+Cu\left(OH\right)_2\)
0,03 0,03
\(Cu\left(OH\right)_2\rightarrow CuO+H_2O\)
0,03 0,03
\(m_{CuO}=0,03.80=2,4\left(g\right)\)