What are the results of the cancer? We're doing a reaction between oxalic acid and sodium hydroxide. We know how much oxalic acid is in here quite accurately because the electron is talented to guesswork for us. When you're doing this, you're going to have your acid in the glass and inside the buret, you have one piece of left wire, two-way top. Inside here is always going to be your base. We're going to add some phenol failing too. What color is phenol failing in the acid? What we're trying to do today is neutralize the acid with the base. We're going to add some phenol failing to the acid. What color is phenol failing in the acid? What color is phenol failing in the acid? What we're trying to do today is neutralize the acid with the base. We want to add just enough base from that buret that we neutralize it and it's done. You don't want to do more base than necessary because then our products wouldn't be this. You have water, sodium oxalate, and excess sodium hydroxide. You're excess reactive. We want just enough in stock. What you're going to look for to know that your titration is done, you want to get the absolute lightest, lightest, lightest pink you possibly paint to know that you stopped the reaction. Because as soon as you see that pink, pink, pink, pink, color pink, then you know I've neutralized it and it's just starting to tip over to the basic side. If you put in too much base, it's fuchsia, let's bad. The other important thing to note, the valve, when it's horizontal, it's closed. When it's vertical, you can see there's still little stuff left over. Open. Don't go to pour your base into the top when this is open. Otherwise, you'll just get a flood of base all over your table. These have a tendency to get clogged from time to time. What you want to do before you start your titration process is just get an empty beaker sitting in your drawer, put it underneath, and open this guy up, and make sure that it's flowing fine. We need to read. Don't do this. I almost just said you need to read the volume of your base that's in here when you start. You know how much it's going to go in here at the end. When I want you guys to look for, as we add the base, you guys see that pink color in there? And it goes away. Pink. Stop. Pink. What's happening in there is there's female failing in there. You add some base and it goes, I see a base. Ah, turn pink. But then there's way more acid in here than there is base. And so that acid comes along and neutralizes that base. It's not basic anymore. And so pink goes away. See how the pink is kind of lingering a little bit longer. It takes longer for it to go away. It's hanging around a little bit longer. Okay, it's all most gone. It's all most gone. And then when you start to see that it's taking a long time for the pink color to go away, that means you're getting closer to the end. Because you're getting closer to that tipping point where there's not enough acid anymore to neutralize your base. You literally get to the end. When you get to the end, it has to be a drop by drop process. Maybe? Maybe? I think we got it. Let's have one more drop. One drop. One drop. I think it's going to jump. It's like a jump. It's like a jump. Now can you see one drop made of pink lemonade? That's what you're aiming for. That's what you're looking for. After you've done all this hard work of being patient and trying to get it to be like like pink, what you're going to, don't forget to read the final volume. If you did all that work, don't forget to write that number down.