\(n_{CH_3COOC_2H_5}=\dfrac{8,8}{88}=0,1\left(mol\right)\)
\(n_{KOH}=0,05.1=0,05\left(mol\right)\)
PT: \(CH_3COOC_2H_5+KOH\underrightarrow{t^o}CH_3COOK+C_2H_5OH\)
Xét tỉ lệ: \(\dfrac{0,1}{1}>\dfrac{0,05}{1}\), ta được CH3COOC2H5 dư.
Theo PT: \(n_{CH_3COOK}=n_{KOH}=0,05\left(mol\right)\)
\(\Rightarrow m_{CH_3COOK}=0,05.98=4,9\left(g\right)\)
→ Đáp án: A