2NaOH + CO2 -> Na2CO3 + H2O (1)
NaOH +CO2 -> NaHCO3 (2)
Đặt nNa2Co3=a
nNaHCO3=b
nCO2=0,3(mol)
Ta có:
\(\left\{{}\begin{matrix}a+b=0,3\\106a+84b=29,6\end{matrix}\right.\)
=>a=0,2;b=0,1
=>\(\sum\)nNaOH=0,2.2+0,1=0,5(mol)
V=\(\dfrac{0,5}{2}=0,25\)(lít)