☁️☾✧AS Level Chemistry: Paper 3 (Practical Exam) // 9701/31/O/N/20 // Question 1 - Titration♡☁️

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I'm finally back from my hibernation! Did you miss me? hehehe
This is a requested walkthrough of q1 which focuses on titration. We will be solving the calculation questions together. These questions involve finding the mass, molar mass, percentage error and more.
I hope you enjoyed this video! ✩⋰\(^ ▾ ^)/
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0:16 - Intro
0:17 Q1a - Preparation of the salt solution
1:19 Q1b - Rough + Accurate Titre
4:00 Q1c(i) and c(ii) - Calculate number of moles of iodine
5:31 Q1c(iii) - Calculate the number of moles of thiosulfate ions
5:56 Q1c(iii) - moles of hydrated sodium thiosulfate
6:56 Q1c(iv) - Calculate the value of x in Na2S2O3.xH20
8:41 Q1d(i) - Max error of balance
9:13 Q1d(i) - Max percentage error
9:55 Q1d(ii) - Minimum relative formula mass of FA1
10:58 Q1fUsing anhydrous sodium thiosulfate titre value
11:38 Q1e - Dilution of iodine?
12:01 - Outro
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#ASLevel #PracticalExam #Titration

[rimasasmr]

Hii great video! I just wanted to ask if these type of questions are always in the paper 3 like titration and if they are like yk similar in structure ?? Also can you please do these types of vids for the 2nd and 3rd questions would be really appreciated!

[glo]

hey my exam is tomorrow and i have a question, do you calculate the volume of FA2 added including the initial bit that was added before the solution turns yellow? or only after the indicator was added \?

[daliaganim]

Hey thank you so much for this video. I would like to ask, in this specific paper does the titration start from as soon as we start adding FA2 from the burette or only after the 10 drops of starch indicator? Because I was confused as to why your initial burette reading is 50.00 and not 0.00

[muntasirahmed]

Do you have the pdf of your solved paper or the actual ms of this paper? I cant find the actual ms of this year anywhere.. the ms 2020 ON 31 has completely different answers than it should be

[Nam.kid_fx]

So when I'm doing my second titrate, should I refill, or should I just pick up where I ended??
I'm getting a little bit confused

[SundayIpawa]

Is that 50cm³ as an initial burrete reading wrong 🤔? Cos when you gonna look for a titre is going to be final minus initial and its not the only think am concerned about!!Everything is quite💯💯👍👍

[maanqasem]

How are you aseel
I wanted to ask if you could be the daughter of uncle sami