Analysis of the miscibility of water and ethyl acetate
Whether water and ethyl acetate are miscible or not is related to many physical and chemical principles. Water, a solvent with strong polarity, its molecules show significant polarity due to the electronegativity difference of hydrogen and oxygen atoms, and the hydrogen bonds between water molecules are vertical and horizontal, maintaining each other tightly.

Ethyl acetate is an organic compound with ester groups in its structure. Although it has a certain polarity, compared with water, its polarity is weak. According to the principle of "similar miscibility", substances with similar polarities are easily miscible. The strong polarity of water and the weak polarity of ethyl acetate are significantly different, which is the first obstacle to the mutual miscibility of the two.

Looking at the experimental phenomenon, the water and ethyl acetate were placed in a container together, and when the tablet was left standing, the two layers were clear. The upper layer is ethyl acetate, the lower layer is water, and the boundaries are clear, which proves that the mutual solubility of the two is not good. Because of the different intermolecular forces, the hydrogen bonding force of water is strong, and the Van der Waals force is the main force between ethyl acetate molecules, it is difficult for the two to break through the binding of each other's molecules and mix evenly.

Of course, it cannot be said that the two are absolutely insoluble. In fact, water and ethyl acetate have very weak mutual solubility. Under a certain temperature and pressure, a small amount of water molecules can penetrate into the molecular gap by slightly interacting with ethyl acetate molecules; similarly, a small amount of ethyl acetate molecules are dispersed in water. However, the degree of mutual solubility is very small, and under normal circumstances, it can be ignored.

In summary, water and ethyl acetate have poor mutual solubility, although there is a very small amount of mutual solubility, but in general, the two tend to be stratified and difficult to mix evenly.