Solution Chemistry Class 12th Chapter 2 Part 6 Depression in Freezing #solution @a2zpractical991

If I start the lecture, during the lecture, please don't try to divert your attention completely here. The pictures you see here are these pictures. The moon is very important, and you should pay attention to it here every time it appears. I assure you that if you watch this video with great care, you will fully understand this entire topic on depression in phase points, and also this topic regarding the child in your board examinations, numerical aspects, and everything based on it. It'll become clear, it'll become clear. Well, I'll just fix my this uh, consp thing, it's getting too big. Who is the owner of the Pahan Chogang Hoo-st Kasi Wangdaan Processant-an? Whose is it, then, that we have? What was that layer? The Colicety Property Red, like a non-acto light, inside it, this thresher part, I read it to you. And in this topic, the mother child, I was not saved. Present, please, please, please, please, please, can do it, it can go away. And I have another peak where I've placed Salt Place Wart. So, let's understand what exactly depression is at freezing points Okay, listen, kid If I do what our beloved Vorter does, then I do this: I'm feeling lonely, child, what's going to happen? Tell me, please, O my dear Everyone will know what is going to happen on the bus, it's just a matter of time. I am bread What I mean is that here, in the freezing point, the temperature is dropping, it's already frozen at zero degrees, but it's dropping even further and is now freezing more. Now, if you want to understand the reason behind this, pay close attention, kid, the water you're pouring... You do it, what happens on this? Are there any salute particles attending? And in Salusin, your water Mother of pain Salute particles, this is your soul's ticket, what session are you in? What does the Miferawey HAIA do with the solvated particles that your solvent has in its inter- Molecular porcine CBS induces B-type substance, so explain why it happens. And the intermolecular porcous attraction is quite strong. The freezing point of this is coming down to zero. But as we here pass the salute particles through Here, the water molecules get separated. And there is no freezing pond for the molecular porosity attraction generated by the strong interaction either. So he takes it It will have to be lowered. I think all the children understand this temperature point of the typhoon here. Look, it's freezing quickly. Okay, but we have to lower its freezing point even further. This is called depression at freezing point. You people will understand these topics very clearly. Let's get started. You will need to explain this to a child, and it will be based on the graph; however, you won't be asked about the graph. If you haven't learned the topic, the child will ask you several times during your board examination. Victor, you've got some things here. Look, your BD—what is BD? It's a liquid solvent. The BD you have is the liquid solvent I mixed separately in a beaker. And what about the F evaporate? What's the main component? Your liquid will solidify at that point. Let's see, look here, now this point B—what does point B represent? It represents the temperature of your CD solvent. That is, if I lower the temperature of this point... So, at this point, what does the solvent mean for you, point by point? Fossnet, which motivates solidaries in our community, drives solidaries 8 What's coming in this vapor? It's equalizing, the vapor pressure of the vapor is equalizing. And make me fall down even more, look here, and then what do you have to do? Solidify it. As the mole is, if the mole is, it is in centimeters that it is It's got two, it's got three It's got four, is it's got five And what is six? Listen to Dpen So our solvent here is below 6 degrees Celsius. But our solution was to apply that non-volatile salt to it. What's the issue with the weight, it's already frozen at 1 point, and how much is it here? 5 I'm reading that the guy from Solutions is getting even more depressed. I mean, if someone comes to this point, freezing will start. Let's check some points here, as I've mentioned. That would have been correct. Alright, next point Alright, now this point is very important, the one you've mentioned This is Eid. Your solution is correct. How is the solution made? Salute. Soo-urs Dhoomeye Piero's Slushan, the true reason Next is the next point, our point is that curves AB and CD intersect at point B. where the solid and liquid phases of the vapor solvents are in equilibrium. What do you see? AB and CD, what's happening at point B? They're freezing, so what will become of us? What is ours going to become? This freezing point—whose freezing point is this? Is this your pure substance? What is this substance of yours? Next point is yours, E; this point E, which points is it intersecting with? That's exactly what you need to write here as the normal point, okay, okay, let's go And the last point, it is not the last point, it is clear from the figure that the freezing point of the solutions TF is lower than that of the freezing point of TF0 Keep watching, the freezing point of TF is much lower compared to your TF0, okay? Let's move on and take a look further here. What comes next is that at the freezing point of the pure liquid, the attractive forces among the molecules are strong enough to cause the phase change from liquid to solid, right? When you cool a pure solvent to its freezing point, you cause it to freeze; the attractive forces within it are very strong, which is why it freezes quickly. But if I consider the solution at par, why does the salute appear inside the solution? Now, if a third entity comes between two people, what happens to the attractive forces between them? If I tell you the conclusion, child, then those which are in your pure liquids, if they don't have any pores, their attractive forces are very good. But your solution has it, what does it contain? Yes, non-volatile solutes obstruct, if a non-volatile solute comes in between, it blocks both, right? It doesn't allow attraction, that's why it needs to be frozen more, to connect them together, come on, A solute never freezes, so when non-volatile solutes are added, all the particles cause a depression in the freezing point, as shown in the graph I just explained. We'll increase the vapor pressure, and if we decrease it, what will happen? Let's move on to the next topic. Start the next topic, child. So, our next topic is freezing point depression and concentration of solutes. Okay. If we consider freezing... This is the leak, freezing point depression, freezing point depression this reaction Portfolios, you, what is it, molality and solution, writing like this, Just pay attention, the child should look at me, look at me, and then the right time will come, let's go. Molar mass, right? It's M. Molar mass of solute Remember For Solvand Pfft. For Solvand, I will always keep the value as 1. And for the solution I already mentioned this last time as well. I will always keep the value at 2. What exactly do you need to find? If you don't mass file, you'll get a mass of salute at the mall. It is known that the one who is being asked about is the one who is being sought. I am going to write a burk. What is Mallality Cop? Solventan has imposed a tax on his own knowledge. w Ɂ ɺʃʃ ʃfʃfʃfʃfʃ ɺ ɻ ɼ ɽ ɺ ʃfʃfʃfʃfʃ ʃ ɺ ʃfʃfʃfʃfʃ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ ʃ ɺ Dazed by meditation mass of solvent in kg we need to find out Then the mass of the solvent is ours Given in grams the mass of the solvent was w1 grams How would you convert this into kilograms? 1 gram divided by 1000 grams upon kg Then gram will cancel out with gram. So what will the answer be, w1 divided by 1000 And where will this come into? It will be in kilograms. Something remains hidden in the igdum nature. So it goes directly upward. Now we have torn, torn both of these values They are cheating. The one with moles and the one with mass of solvent We put it here, right here. So tell us, what will we get? Page 2, please. so molality is equal to Tell me what will happen How will this happen? w2 by m2 It will go above 1000. He who stays low directly goes upward. will go to W2 So this is the molality ahead of us Now we knew what we knew w2 by m2 upon 1000 by w1 Now it's your turn Depression What was it, man? Depression in freezing point constant Depression at freezing point What was delta TF? Did you know? What should I do with the value of m there? I do Just as you put the value of m here So what will you get here what is equal to That is your W-2. into 1000 divided by m2 to w1 What do we need now? molar mass of solute required That is M2 needed I'll move m2 over here. that is our m2 equals kf into w2 into 1000 divided by, this will come this way delta TF to w的日子 You must memorize this formula thoroughly. The formula will be used in every single numerical. What will be the case for each numerical using this formula? This will be used. Let's start our numerical problems. Here are the numericals. Look at this Problem 2.8 1.02 grams of urea when dissolved in 98.5 grams of a certain solvent decreases its freezing point by 0.21 kelvin 1.6 grams of the unknown compound when dissolved What two things have been given? First of all, you are given Salute has been given Represent salute with 2 1.02 grams of urea dissolved in 9.8 grams of the specific solvent w1 has been completed 9.8 grams of the certain solvent and its freezing point Here, you are given the freezing point. delta TF delta tf is equal to solvent in the freezing point delta TF 0.211 kelvin What else has been given? It has been given so much And what else has been given? 1.6 grams of the unknown compound when dissolved when dissolved in 86 grams of the same Here are two different things here Given is one, this is given And one has given you another wait, look here w2 I write in W2 Dash 2.09 grams gram of unknown compound when dissolved in Which one do we write as "w1" from "w1 solvent"? 1 gram of the 86 gram of the solvent this two Mixing different things How much was given? 0.34 Calvin Calculate the molar mass of the unknown. compound while molar mass of the urea M2 has been given to you. 60 grams mole inverse gram And he's asking you about urea Calculate the molar mass of the unknown. Molar mass means m²; it's asking you about the unknown one I'll give you a formula I'll show you how to calculate it. You know, you have to calculate m2 You both Apply the formula involving the freezing point depression constant. So, what was your formula? I'll just tweak that formula a bit Look, this formula is somewhat like this This kind of way Hi What did we get from the formula? It had been found in this manner. I will slightly manipulate the formula so that I can put those there. What am I manipulating? I am Thaoujan, your I'll keep this one. thousand I'll keep this one. Now that I've kept 1,000 here, what will happen? Will it go somewhere inside the belly? Or will it go into the division? Let's see how I use this formula Look how Tell your mother about this 1000 KF is equal to M2 Delta Tf W1 upon W2 This was a formula for it; now the dash one I'm writing a formula. What is the dash formula? This was a formula for it; now look, what will happen here? M2 dash into delta T_f prime What will W1 become? dash divided by W2 will become dash What will happen to you, W2? Alright, let's go. W2, what will happen to you? Yes—come on Do you know what these two could be? Now, tell me, what will this become? What will happen to this? M2 to delta Tf into W1 upon W2 is equal to M2 dash into delta Tf dash into W1 crash into W2 Alright, let's go ahead and get the ripped value now. You are giving me whatever is given here Tell me what values have been given What is the value of W2? First, I'll enter this one. That is 1.02 grams. into ΔTf What is the value of K? 0.211 K into What is the value of W1? W9.8 9.8 divided by What is the value of W2? The value of M2 here is 60. M2 means Look, here it was 60, I mistakenly wrote the league. What is the value of W2? 1.02 grams Now let's write it down. M2 dash We need to figure out the M2 dash. What do we have to do with the M2 dash? It needs to be found out. 0.34 to W1 W1 gave us 86 86 grams into W2 has been given. 1.609 grams Now you will be well taken care of by everyone Carry over in multiplication We need to find the value of M2 dash. I multiply by splitting into pieces. How much do I get? I am doing multiplication. I'll make it a bit smaller. I multiply the torn ones. I'll use the mobile. for multiplication If I had everything When I multiply, what do I get here? that is 1.222.55 If I had everything I multiply 1222.55 is equal to M2 dash It's available right here. that is 1817 We would get this much. What do I need We need M2 dash here What should I do? M2 dash 2.222.55 divided by 18.17 Now we tear it into pieces and throw it into the fire. We make it torn and tattered, we make it divine. 12.222.55 divided by 18.17 So it's coming our way. Approximately 67.28 gram inverse mole Whose value have we obtained? I found out The value of M2 is given. gram M2's units are provided So we can write it down by looking from here mole inverse per gram It belongs to M2. They will remain the same on the M2 dash as well. So it will come to you. What will be the gram mole? This will become your final answer. M2's Come on Yes For writing What too So you can handle every single thing in AG's way, save the vaccine, this video, this video is absolutely for you They were designed so that you could easily understand this chapter, so how did you find it? Your comment in the comment box from the video should be a sweet, lovely comment about this lecture, okay? Alright, thank you. See you later.