\(2HCl\left(0,02\right)+Ba\left(OH\right)_2\left(0,01\right)\rightarrow BaCl_2+2H_2O\left(1\right)\)
\(H_2SO_4\left(0,02\right)+Ba\left(OH\right)_2\left(0,02\right)\rightarrow BaSO_4\left(0,02\right)+H_2O\left(2\right)\)
\(n_{BaSO_4}=\dfrac{4,66}{233}=0,02\left(mol\right)\)
\(\Rightarrow n_{Ba\left(OH\right)_2\left(1\right)}=0,2.0,15-0,02=0,01\left(mol\right)\)
\(C_{MddHCl}=\dfrac{0,02}{0,02}=1M\)
\(C_{MddH_2SO_4}=\dfrac{0,02}{0,02}=1M.\)