We can simply look that up. So in my first step, I basically want to find a KB. And I want to find a KB using this formula here. Now, if you don't know what this formula is or where it comes from, check out the link above and I'll tell you why in a second. We want to find the KB. Well, kw, something we know at some given temperature at a 25 degree celsius, kw is tens of negative 14.