To precautions today so that you have an accurate location. So the first thing that I always tell my students is when you are reading the markings off the bureau, it always read from the bottom of the meniscus and not the top. So if this is a meniscus here, I read it from this line. This is correct. Reading in from this is important. And secondly, always make sure that your sergeant level is at eye level, so if you are looking at it at this angle, you'll get a leading off. It's in 19.7. If you're looking at it from up top, you'll get a value of 19.662 You're looking at it from the bottom. You'll get a value of about 19 porn H two and both these values and infrared, and this is called parallax error. To avoid it, make sure that you bring your pure it down to eye level. If you're on the taller side, Um, like my husband, I would suggest you lifted upwards, and if you're on the shorter side like me, make sure you can move your bureau it down so that you are looking at it directly at eye level on not, um, at an angle. This is very, very important because it can mess up your calculations. The second thing is, um, near the end point, you'll sometimes see the color change. And this is because the Titan is not evenly distributed. And so it will give you the, um didn't give you a false Woz. Do it'll make you think that your reaction has reached complete completion, which is not true. So the best thing to do in this case is too swore. When you swirl you, you distributed distribute the tri trin, even me. And sometimes the color will go back to the original color that you were seeing in the flask then and your Titan drop wise slowly with continuous swirl. Yes, Despite taking on this precaution, you overshoot the mark. What you can do is add more unknown solution. This is usually what you have in the particles last. Add Titan to do it and look for the end point. This will definitely help you, um, get the filtration value correctly.