a) CuO + 2HCl → CuCl2 + H2O
\(n_{CuO}=\dfrac{40}{80}=0,5\left(mol\right)\)
b) Theo PT: \(n_{HCl}=2n_{CuO}=2\times0,5=1\left(mol\right)\)
\(\Rightarrow m_{HCl}=1\times36,5=36,5\left(g\right)\)
\(\Rightarrow m_{ddHCl}=\dfrac{36,5}{5\%}=730\left(g\right)\)
c) \(m_{ddCuCl_2}=40+730=770\left(g\right)\)
nCuO = \(\dfrac{40}{80}\) = 0,5mol
CuO + 2HCl -> CuCl2 + H2
0,5--->1------->0,5mol
=>mHCl(d2) = \(\dfrac{1.36,5.100}{5}\) = 730 g
=>mCuCl2 = 0,5. 135 = 67,5 g