The polarity of water and ethyl acetate is related to its molecular structure and charge distribution. For water, the molecular formula is\ (H_ {2} O\), and its molecules have a V-shaped structure. Oxygen atoms are highly electronegative. When bonding with hydrogen atoms, the electron cloud is biased towards the oxygen atom, making the oxygen end partially negatively charged and the hydrogen end partially positively charged, so it has significant polarity.

As for ethyl acetate, its structural formula is\ (CH_ {3} COOCH_ {2} CH_ {3}\). Although the molecule contains carbonyl and ester groups, the overall structure is relatively symmetrical. The carbon-oxygen double bond in the carbonyl group, the oxygen has a certain electronegativity, which makes the electron cloud biased towards oxygen; however, the structural distribution of the ester group weakens the molecular polarity to a certain extent.

According to common sense, the polarity of water is stronger than that of ethyl acetate. Water is highlighted by its unique V-shaped structure and significant electronegativity difference between hydrogen and oxygen. Although ethyl acetate contains polar groups, the symmetry of the structure and the interaction of the groups make its polarity weaker than that of water. The difference in polarity between the two has a significant impact on many chemical processes, such as extraction and dissolution. During extraction, due to the different polarities of water and ethyl acetate, the solutes are allocated differently between the two according to their polarity. During the dissolution process, polar solutes are easily soluble in polar water, while non-polar or weakly polar solutes are more likely to dissolve in ethyl acetate with weaker polarity.