Có: \(n_{Cu\left(OH\right)_2}=\dfrac{19,6}{98}=0,2\left(mol\right)\)
a, PT: \(Cu\left(OH\right)_2+2HCl\rightarrow CuCl_2+2H_2O\)
________0,2______0,4_____0,2 (mol)
b, \(m_{CuCl_2}=0,2.135=27\left(g\right)\)
c, \(C_{M_{HCl}}=\dfrac{0,4}{0,2}=2M\)
Bạn tham khảo nhé!