\(n_{Ba\left(OH\right)_2}=0,05.0,05=0,0025\left(mol\right)\)
\(n_{HCl}=0,15.0,1=0,015\left(mol\right)\)
\(PTHH:Ba\left(OH\right)_2+2HCl\rightarrow BaCl_2+2H_2O\)
Bđ______0,0025______0,015
Pư______0,0025______0,005____0,0025
Kt________0________0,01______0,0025
\(C_{MddHCldư}=\dfrac{0,01}{0,2}=0,05M\)
\(C_{MddBaCl_2}=\dfrac{0,0025}{0,2}=0,0125M.\)