On the miscibility of ethyl acetate and hexane
Whether ethyl acetate and hexane are miscible, it is necessary to investigate the properties of the two. Ethyl acetate has the commonality of esters, and its molecular structure contains carbonyl and ethoxy groups, showing a certain polarity. Hexane belongs to alkane, and the molecule is composed of hydrocarbons, with a symmetrical structure and little polarity, which is almost non-polar.

Looking at the principle of mutual miscibility of substances, it is often said that they are "similar and miscible". Substances with similar polarity are easily miscible with each other. However, although ethyl acetate has polarity, it is not strongly polar; hexane is almost non-polar. The polarity difference between the two is not so great that it is absolutely incompatible. And both are organic compounds, with van der Waals forces between molecules. Van der Waals forces include dispersion force, induction force and orientation force. In the system of ethyl acetate and hexane, the dispersion force plays an important role. Because both molecules contain hydrocarbon chains and have similar electron cloud distribution, the dispersion force can maintain the interaction between the two molecules.

The experimental evidence shows that when an appropriate amount of ethyl acetate is mixed with hexane, it can be seen that the two rapidly blend without stratification and form a homogeneous phase. This experimental phenomenon conclusively shows that ethyl acetate and hexane are miscible. The essence is that the intermolecular force makes the two mutually friendly, which conforms to the broad category of the principle of "similar miscibility". Although the polarity is different, the similarity of the organic structure and the effect of van der Waals force cause the two to be miscible.