\(n_{H_2SO_4}=0,2.1=0,2\left(mol\right)\)
PT: \(H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O\)
Theo PT: \(n_{Na_2SO_4}=n_{H_2SO_4}=0,2\left(mol\right)\)
\(n_{NaOH}=2n_{H_2SO_4}=0,4\left(mol\right)\)
\(\Rightarrow V_{ddNaOH}=\dfrac{0,4}{1}=0,4\left(l\right)\)
\(\Rightarrow C_{M_{Na_2SO_4}}=\dfrac{0,2}{0,2+0,4}=\dfrac{1}{3}\left(M\right)\)