So our concentration of hydronium in our solution is seven molar. So we know Kw and we know this guy. Now, we could plug it in and find our result. Now, by the way, if you're confused at this part, or if you're confused about the autoimization of water, check out the link below. So we basically take our numbers, we plug them in, and we find that 10th of the negative 14 divided by seven gives you 1.43 times ten to negative 15 molar of this guy of seven molar nitric acid solution. So this means that our concentration of our base, of our hydroxide is very, very small.