a, PT: \(CuO+2HCl\rightarrow CuCl_2+H_2O\)
b, Ta có: \(n_{CuO}=\dfrac{8}{80}=0,1\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{CuO}=0,2\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,2.36,5=7,3\left(g\right)\)
\(\Rightarrow m_{ddHCl}=\dfrac{7,3}{7,3\%}=100\left(g\right)\)
c, PT: \(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)
Theo PT: \(n_{H_2SO_4}=n_{CuO}=0,1\left(mol\right)\)
\(\Rightarrow V_{ddH_2SO_4}=\dfrac{0,1}{0,5}=0,2\left(l\right)=200\left(ml\right)\)