So before we talk about acid and basis, we must define what acid and bases are. Well, if you want to learn more about the various types of definitions that exist between acid and bases, check out the link below. In this lecture we're going to focus on the bronzed lottery acid based concept. So according to that definition, acids are defined by their ability to donate an H plus ion, while bases are defined by their ability to accept an H plus ion. So what makes a compound X a better acid than compound Y? Well, stronger acids are better at donating than H plus ion than weaker acids are.