Margules Function is a very fancy way of describing how different things like to be close to each other or stay apart. Just like you have friends that you like to be close to and others you may not want to be around, different chemicals also have preferences for being near each other or staying apart.
When we mix two chemicals together, like water and alcohol, they can either mix together really well or not so well. The Margules Function helps us figure out how well different chemicals will mix together. It's like a recipe that tells us how much of each chemical we need to get them to mix just right.
Scientists have come up with fancy equations to describe the Margules Function, but all you need to know is that it helps us figure out how different chemicals behave when we mix them together. So, next time you're doing a science experiment and mixing different things together, just remember the Margules Function is helping you understand how well they'll mix!