\(2HCl+Ba\left(OH\right)_2\rightarrow BaCl_2+2H_2O\)
Theo PT : \(n_{HCl}=2n_{Ba\left(OH\right)_2}=2.\dfrac{400.1,2.17,1\%}{171}=0,96\left(mol\right)\)
=> \(V_{HCl}=\dfrac{0,96.36,5}{3,65\%.1,05}=914,29\left(ml\right)\)
\(m_{Ba\left(OH\right)_2}=400\cdot1.2\cdot17.1\%=82.08\left(g\right)\)
\(n_{Ba\left(OH\right)_2}=\dfrac{82.08}{171}=0.48\left(mol\right)\)
\(Ba\left(OH\right)_2+2HCl\rightarrow BaCl_2+2H_2O\)
\(0.48..............0.96\)
\(m_{HCl}=0.96\cdot36.5=35.04\left(g\right)\)
\(m_{dd_{HCl}}=\dfrac{35.04}{3.65\%}=960\left(g\right)\)
\(V_{dd_{HCl}}=\dfrac{960}{1.05}=1008\left(ml\right)\)