\(n_{BaO}=\dfrac{30,6}{153}=0,2mol\)
\(BaO+H_2O\rightarrow Ba\left(OH\right)_2\)
0,2 0,2
Để trung hòa: \(n_{OH^-}=n_{H^+}=0,2mol\)
\(\Rightarrow m_{HCl}=0,2\cdot36,5=7,3\left(g\right)\)
\(\Rightarrow m_{ddHCl}=\dfrac{7,3}{14,6}\cdot100=50\left(g\right)\)
PTHH: BaO + H2O ---> Ba(OH)2 (1)
Ba(OH)2 + 2HCl ---> BaCl2 + 2H2O (2)
Ta có: \(n_{BaO}=\dfrac{30,6}{153}=0,2\left(mol\right)\)
Theo PT(1): \(n_{Ba\left(OH\right)_2}=n_{BaO}=0,2\left(mol\right)\)
Theo PT(2): \(n_{HCl}=2.n_{Ba\left(OH\right)_2}=2.0,2=0,4\left(mol\right)\)
=> \(m_{HCl}=0,4.36,5=14,6\left(g\right)\)
Ta có: \(C_{\%_{HCl}}=\dfrac{14,6}{m_{dd_{HCl}}}.100\%=14,6\%\)
=> \(m_{dd_{HCl}}=100\left(g\right)\)
