Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\\n_{KOH}=0,15\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) KOH dư, tạo muối trung hoà
PTHH: \(CO_2+2KOH\rightarrow K_2CO_3+H_2O\)
Theo PTHH: \(n_{K_2CO_3}=0,05\left(mol\right)=n_{KOH\left(dư\right)}\) \(\Rightarrow\left\{{}\begin{matrix}m_{K_2CO_3}=0,05\cdot138=6,9\left(g\right)\\m_{KOH}=0,05\cdot56=2,8\left(g\right)\end{matrix}\right.\)