The strongernucleophilein the given pair is CH3CH2O− (ethoxide ion).To determine the stronger nucleophile in the given pair (CH3CH2O− and CH3CO2−), we need to consider their nucleophilic properties.Both CH3CH2O− and CH3CO2− are negatively charged species and can act as nucleophiles. Thenucleophilicity of a speciesdepends on its ability to donate a pair of electrons to form a new bond.In this case, CH3CH2O− (ethoxide ion) is a stronger nucleophile compared to CH3CO2− (acetate ion). This is because the ethoxide ion has a simpler structure, with the negative charge residing on the oxygen atom. The oxygen atom in ethoxide ion has a higher electron density and is better able to donate its electrons, making it a stronger nucleophile.On the other hand, the acetate ion (CH3CO2−) has a more complex structure with the negative charge delocalized over the oxygen and the adjacent carbon atoms. Thisdelocalizationreduces the electron density on the oxygen atom, making it a weaker nucleophile compared to the ethoxide ion.Therefore, CH3CH2O− (ethoxide ion) is the stronger nucleophile in the given pair.Learn more aboutnucleophiles:brainly.com/question/14052597#SPJ11...

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