And if this is our base, it will accept that H creating a hydronium ion. So now, if we wanted to, we can also write the equilibrium equation for this reaction. In other words, kw, our ionization constant for water is equal to hydronium concentration times the hydroxide concentration. And at 25 degrees Celsius, this equals 10 times ten to negative 14. Now, this process is called the autoimilization reaction. And if you want to learn more about this reaction, check out the link below.