Sửa đề: "2,24 lít CO2"
PTHH: \(CO_2+2KOH\rightarrow K_2CO_3+H_2O\)
Ta có: \(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{KOH}=0,2\left(mol\right)\\n_{K_2CO_3}=0,1\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}C_{M_{KOH}}=\dfrac{0,2}{0,1}=2\left(M\right)\\C_{M_{K_2CO_3}}=\dfrac{0,1}{0,1}=1\left(M\right)\end{matrix}\right.\)