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Q1. Which of your = standardization titration trials do you claim was the worst? State what evidence are You using to conclude that claim and explain how that evide...

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Q1. Which of your = standardization titration trials do you claim was the worst? State what evidence are You using to conclude that claim and explain how that evidence supports it.02. Propose what could have happened in the lab with that worst trial In other words, what could ve happened that led to error in the measurements that is reasonable and consistent?CalculatlonaDatasatReadnType here t0 search

Q1. Which of your = standardization titration trials do you claim was the worst? State what evidence are You using to conclude that claim and explain how that evidence supports it. 02. Propose what could have happened in the lab with that worst trial In other words, what could ve happened that led to error in the measurements that is reasonable and consistent? Calculatlona Datasat Readn Type here t0 search



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The following acid–base indicators change color in the indicated pH ranges: bromthymol blue (6.0–7.6), thymolphthalein (9.4–10.6), and alizarin yellow (10.1–12.0). Which indicator is best for the titration in Problem 15.16? Which indicator is unacceptable? Explain.

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.

So let's talk a little bit about titillation. Okay, so we've got a cigarette and then we usually have a flask of some sort. So in the flask we're going to usually start with a standard solution. So that means we'll put a solution of known more clarity. Okay so the polarity of this solution will be known. So if we no the volume right, we can find the moles of that solution of the salute in the solution and then appear in the bure it. We put our unknown solution and then we just add until we hit the equivalence point. So the reactions just done. Okay, so then we'll have the the volume that that we've added. Okay, so we can use to like geometry to find the moles and then the volume. So we can find a polarity of our unknown solution. And this works so well because you can narrow in on the equivalence point really slowly by adding um adding drop wise. Okay, so we can go into this equivalence point pretty precisely because we're adding drop wise. The trick of course, is to make sure you use an appropriate indicator and basically you just want to make sure you pick something that it changes color right at the equivalence point. But if you do that you can very precisely figure out the polarity of our unknown solution. So tight rations is a really good way to do this

The question is named That common indicators used in the Service depression? How is a mixture containing any words and any to see a tree and alleged by the decoration? So common indicators that are used in the operation that are not three and a metal orange and martin. Orange. Okay. In this case the weak acid is colorless and its iron is the bright pink because any word is the strong waste and I need to see a tree is the mixture of any words and weak acid excruciating. They So in the Service citation, he used three and a little orange to human indicators that are used to the indicate the color change in the new creation of the acid and base reactions. Okay?

So a ph scale goes from one point oh 2 14 point since we're using the tens place, so our sample space is going to be one point oh 1.11 point two dot dot dot, And then we got the 14.0. Mhm.


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