Now, notice that our exponents here are one and one. That's because we have 1 mol and 1 mol. So, since we know our kw, and from experiments, we know that at a PH of seven, our concentration of hydronium is 1.0
times ten to negative seven. That means, since we know this guy and this guy, we can find the concentration of hydroxide. And we can do it by simply dividing through by 1.0
times ten negative seven. And we get x equals 1.0 times ten to negative seven.