To determine the molarity of KMnO4 by titrating it against standard solution of FAS ( Mohr's Salt)

We are going to carry out experiment number 2 Relief from the original text. One of the most important experiments in 12th-grade chemistry is the determination of the rate constant and order of a chemical reaction using the iodine clock reaction. and it is fixed for 10 marks in your 12th board examination i.e., in the practicals worth 30 marks The same titration worth 10 marks is fixed for you. So, are you getting my point? Okay, the aim of this experiment is I'll tell you that we know the molarity of one solution and we have to determine the molarity of another solution So, basically in this titration We are going to find out the molarity. Our aim is to determine the molarity. i.e., concentration of KMnO₄ by titrating it against the standard solution ferrous ammonium sulfate which is also known as Mohr's salt What is it called? Mohr's salt In theory, it is written that Mohr's salt has been calculated. 392 into 100 into 0.1 divided by 1000 So, 0.1 is the molarity of Mohr's salt. 0.1, which is given to you But what does KMnO4 say in the target? We have to determine What does it say in the aim? That determines the molarity of KMnO4 So, what do we need to do with the molarity of KMnO4? We have to find out And whose molarity is specified? Ferrous ammonium sulfate which is also known as Mohr's salt What is it called? Mohr's salt Its molarity is given as 0.1. So, you have to titrate KMnO₄ with the given molarity and determine the molarity of KMnO₄ So, what is our goal? Whose molarity do we need to determine? What is the molarity of KMnO₄? We have to determine it. Which standard solution is provided to us? Ferrous ammonium sulfate FAS Mohr's salt I am saying a lot in its name So, we have to create FAS first What do we need to do regarding FAS? We have to prepare it. It is very easy to prepare. You must write the calculation in the theory. Only then do you get the marks What is the calculation? 392 Do you know what 392 is? It is the molecular weight of FAS. We'll make it into 100. What is the given molarity of FAS? We have to make it 0.1 molar. 0.0001 We have to dissolve it in 1 liter. There is a formula for molarity. Molarity is weight divided by molecular weight. 1 per liter I will explain it later Let's proceed with our procedure. From the theory, we know that We have to take 3.92 grams of FAS. It is written in the theory How much FAS do we have to take? 3.92 grams What do we have to take? FAS How much ferrous ammonium sulfate do we need to take? 3.92 grams What do we need to do with 100 ml? Dissolve it Then your solution will be ready. What is the molar mass of FAS? 0.1 molar What is the molarity of FAS? 0.1 molar Is it clear to everyone? What is the molarity of FAS? 0.1 molar We have to make the solution. Let's get ready. What do you need for this? Watch glass You must weigh the FAS in the watch glass. This is FAS We also call it Mohr's salt. Now OK It shows the weight of FAS What do you have to do? Tear it What do you have to do? Tear We have to keep it OK I will tear it apart. It will amount to zero. OK After that You have to take 3.92 grams of ferrous ammonium sulfate. Now What will I do? I will try to dissolve it I will add it to the small beaker. It is still attached. OK What will I do? I have water. I will take 60 ml or 50 ml of water. OK I will wash it 2 to 3 times. What will I do with this watch glass? I will wash it 2-3 times and add water to it. OK So that the ferrous ammonium sulfate goes into it You don't have to take much I have taken 60–80 ml. That's why I should have taken 50 ml first You don't have to drink more than 50–60 ml of water. OK Dissolve it thoroughly. No particles or solids should remain below OK This is a volumetric flask. You have to prepare a circle here If you prepare the liquid up to this circle It becomes 100 ml. How much is it? 100 ml This circle will be visible here It will be a colorless liquid. Let's look at the lower meniscus. Which meniscus do we see? Lower I will tell you what the lower meniscus is. The lower meniscus is like a lower cup. It should touch that line I will transfer it into it. OK I have transferred it. I'll take some more water. And I will wash it 2 to 3 times. That's why I was saying If you take more water It will cross this line later OK Now it is washed. I will wash it. I will wash it one more time What do we have to do 2 to 3 times? We have to wash it. OK I will wash it one more time Now listen carefully When it comes to the line I will stop. OK The liquid was reaching this line. So I stopped Now I will use the pipettes. I will use this And If you make this solution To stop its hydration What do we use? Concentrated H₂SO₄ We have to add 1-2 drops. If it is concentrated We have to handle it with great care. OK So I will add 1 to 2 drops. Concentrated H₂SO₄ So that it doesn't get hydrated Now see It will turn into a colorless liquid. OK What do we do now? We will fill it up to that line It's a bit too much. OK It shouldn't be too much. Now see Why did I fill it too much? Because I am telling you See There is a layering Of liquid The layering of liquid Should touch this line I don't care about the top part The curve of liquid Should touch this line So what will happen When will it become 100 ml? It will be ready. 0.1 OK Now I will do it once like this And once like this Once like this And once like this Once like this And once like this OK Now my 100 ml solution Is ready Whose? FAS How many moles? 0.1 mole How many moles? FAS What does FAS mean? It is called Moharsalt. It is also known as Ferrous Ammonium Sulfate OK See The obvious solution Is ready Now my next step will come. What is the next step? Procedure We will read the next one. Means Our 100 ml Solution Is ready Now we will set it aside. This is my Standard solution What is the solution? Standard solution Now we will read Procedure No. 2 What is said in Procedure No. 2? Rinse the burette Pipette Erlenmeyer flask I have washed everything. Now see I have to fill 4th mark on the burette But we cannot Fill it directly OK We cannot Fill it directly OK So what will I do? First you have to Close the knob And rinse The burette So how do you rinse? See You will add Path 4 in it OK And The whole Around it Has been Rinsed Now I will Open the knob And take out The whole Route 4 This is bad Route 4 OK Because it has been Rinsed I have put Moisture and water So it's Molarity will Decrease Because you have Its molarity Like you know Its molarity Is 0.1 So you will Experiment And find out Its molarity OK Let's see First I will Clear it See The whole Liquid has been Filled here Can you see? OK I will do it this way The whole Liquid has been Filled here Can you see? First it was Space blank OK Now I will Set it to 0 I will turn the knob. All this OK I could have Used this Route 4 But I have Added it So now I have to Throw it. OK If I had Kept this Beaker here It would have Been usable OK Yes Is there Any problem In the back? OK Now let's see What to do Next step I have Filled it Now see I have a pipette. What do I have? Pipette You have to Rinse the pipette In the pipette You have to Add 0.1 Molar OK You have to Rinse it Because There is Liquid Around it OK So now I will FAS In it And I will Throw it. OK Let's see Don't Do it Up and down Otherwise The liquid Will go In it OK I will Pull it OK I have It OK Now I will Adjust it To this line There is a line If you Adjust it 10 ml Will be ready See I have Adjusted 10 ml OK Now I will Transfer it In this Erlenmeyer flask The last Drop I have Removed At the last Drop Where If there is An error OK So Take 10 ml Now I will Add 1 Tube S2020 Of S2020 2 Normal This will be given to you. I made a mess. I'll put these 2 normals into H204. What should I do with this? I will transfer it into a test tube. It will work normally if taken as usual. A little bit less, a little bit more, okay And this is Kamino 4's agent. There will come a time when you will be colorless. Light pink color will come, not dark pink. How should it be? Sorrow is coming again now Say, for this I'm just a little bit I have slowed down the titration. Okay, this is the light pink color What's coming next? Light pink color Exactly, this is the light pink solution. If such a light pink comes to you So that is the Your reading is fine now, here is the reading for you It's mine, 13.4 How much is it? 13.4 So about my First reading came in at 13.4 and above Is 13.4 coming next? Just give it to you now. Two readings like this, you get 13.4 They will remain, but not necessarily what you think The first one might be correct, but your second reading could be right. 14 today, you'll get two readings They will stay like this, making such a fuss, on the 14th. What will you do to get the second reading from back? You'll fake it, you'll wash it. What are you going to do with it properly? You will wash it back, 10 ml from you What will you do? Are you going to remove this pipette? You will dispense 10 ml pipette Transfer to conical flask Then What will you do next, will you stand firm or give in? Will you stand S2SO4? You will stand firm. No, it's already rinsed once. Then, what are you going to stand stubbornly about from the back? S₂SO₄ What will you do, O proud one? S2SO4 and back from there If you wish, you can extend this period to You can fill it in, otherwise from here Your reading would have been one count. What am I supposed to do with it then? I'll fill it in for you What will you do from now on? Shall we start? Malu, your reading back again It comes at 13 points. I had 13 points, mine was 4. If your reading comes back So, what will your practicals be? Correct But back The reading that I received 13.4 milliliters So this has become mine. 2 constant readings What do you call this? So you can write 13.4, 13.4, 13.4, inside that box Alright, when you look at the observation table, The difference is 0.0. Sari, initial I initially took how much? I took zero. How much was the titration later? 13.4, then what will the difference be? Then come the observations. solution in burette, burette in solution What did I take, chemno 4 solution in pipet What was taken in the pipette, 0.1 mol of FAS? It's called a pipette, okay What was in the conical FAS, in the conical FAS FAS plus concentrated S2SO 4, which indicator was it? What is the indicator here, chemno 4 itself Whatever answers I receive will become my reality. molarity of Chemno 4, meaning I have Tomorrow, Chemno 4 was prepared, 0.01 Alright, if that's what you get Then, a little further down, there is a small shrine, so you have What will the rating be, will it be right, okay, clear What are you doing, what are you doing It had made this. What was the first name of Titration? Diodorus Tyrannicide, alright, this This Didda Titration Inside, the bicycle, we have Chemno 4 and What were the FAS agents doing, titration? Bisikale, we They were preventing dehydration in it. so that this liquid does not enter our dialysis Not being able to happen is fine, otherwise it's yours, Look, which color did the solution come out in? So, this is the tight iteration Doing it would take too much time. No, otherwise