và Ba(OH)2 0,15 M chứ nhỉ?
Gỉa sử \(V=1\left(lit\right)\)
\(\Rightarrow n_{H^+}=0,2\left(mol\right)\)
\(n_{NaOH}=0,2\left(mol\right);n_{Ba\left(OH\right)_2}=0,15\left(mol\right)\)
\(\Rightarrow n_{OH^-}=0,5\left(mol\right)\)
\(H^+\left(0,2\right)+OH^-\left(0,2\right)\rightarrow H_2O\)
\(\Rightarrow n_{OH^-}\left(dư\right)=0,3\left(mol\right)\)
\(\Rightarrow pOH=-log\left(\dfrac{0,3}{3}\right)=1\)
\(\Rightarrow pH=14-pOH=14-1=13\)