The polarity of ethanol and ethyl acetate
is related to polarity, and the polarity of ethanol and ethyl acetate is different, which can be explored.

Ethanol has a hydroxyl group (OH), which is highly hydrophilic. The oxygen atom in the hydroxyl group is highly electronegative. When bonding with the hydrogen atom, the electron cloud is biased towards oxygen, causing the hydrogen atom to be partially positively charged and the oxygen atom to be partially negatively charged, so the ethanol molecule has obvious polarity. And because of the hydroxyl group, ethanol can form hydrogen bonds with water molecules, which also highlights its polar characteristics and has good solubility in polar solvents.

In contrast, ethyl acetate has an ester group (-COO) in its structure. Although the oxygen atoms of the carbonyl group (C = O) and the ether bond (C-O-C) in the ester group have certain electronegativity, the overall structure is relatively symmetrical. The electron cloud distribution is more uniform than that of ethanol, resulting in its polarity being weaker than that of ethanol. The solubility of ethyl acetate in water is inferior to that of ethanol, and it is mostly miscible with non-polar or weakly polar solvents.

The polarity of the two caps is different due to the difference in structure. The hydroxyl group of ethanol is the key to polarity, while the relatively symmetrical structure of ethyl acetate weakens its polarity. This difference in polarity has a significant impact in many fields, such as chemical separation, reaction medium selection, etc. It is necessary to carefully investigate the polarity characteristics of the two in order to make good use of them.