PTHH: \(CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\)
Ta có: \(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{NaOH}=0,2\left(mol\right)\\n_{Na_2CO_3}=0,1\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}V_{NaOH}=\dfrac{0,2}{0,6}\approx0,33\left(l\right)\\C_{M_{Na_2CO_3}}=\dfrac{0,1}{0,33}\approx0,3\left(M\right)\end{matrix}\right.\)