When you mix things together, like sugar and water, the water is called the solvent. Solvents can dissolve different things and make them all come together. In science, people try to figure out how these solvents work and how they can be used to make things better.
Imagine you're making soup, and you add a bunch of vegetables into a pot of water. As you cook the vegetables, the water starts to absorb all the flavors and nutrients, making the soup super tasty. This is kind of like what happens in solvents.
Solvent models are like pretend versions of solvents that we can study without having to use real chemicals and make a mess. We want to know how solvents work in different situations, so we use models to help us understand.
Scientists use different models to try to figure out how solvents work, but they all involve pretending that things are happening in a certain way, like a kind of story. By playing with these pretend stories and seeing what happens, scientists can learn more about real solvents and how they can be used for different things.