Dissolved Oxygen Estimation by Winkler's method Experiment

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ThomasTKtungnung

ThomasTKtungnung

4 жыл бұрын

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X: / thomastktung In this video, i describe in detail both theoretical and practical aspects of estimating the dissolved oxygen content of a water sample. I cover in detail the Alsterberg Modified Winkler's (Azide) Method for DO estimation. I also touch briefly on the the Rideal-Stewart Modified Winkler's (Permanganate) Method.

Пікірлер: 70
@triptiranitalukdar4796
@triptiranitalukdar4796 2 жыл бұрын
For this experiment this video is the best one on youtube by far. Presentation, mechanism, detailing everything is explained in a very lucid manner. Sir, I just can't thank you enough for how much this video helped me & a lot others. 🙏🙏🙏 (From India)
@wisdomharringtonkaunda8830
@wisdomharringtonkaunda8830 Жыл бұрын
You are lucidly right there.
@saveyourtime24_7
@saveyourtime24_7 Жыл бұрын
Sir really really awesome explanation.. u spent your time with us with a clear explanation.. no matter how much time has gone.. my time in this video values.. tomorrow I have my semester practical.. bless me sir ❤
@RafsunJaniBadhon-kj7nz
@RafsunJaniBadhon-kj7nz 10 ай бұрын
Superb. Sir you explained in detail. I didn't get like this in other videos. Thank you so much sir.
@RMalai
@RMalai Жыл бұрын
Thank you. I use this method to find the water quality. just learning from this as what is actually happening when those reagents are added to water.
@viswaa2355
@viswaa2355 2 жыл бұрын
Loved it💥✨ great work
@jeasgrejoyandrews2720
@jeasgrejoyandrews2720 3 жыл бұрын
can this method be used for supersaturated solutions of dissolved oxygen or need any modifications?
@sharmi6105
@sharmi6105 3 жыл бұрын
Well explained. Thanks
@adilkhan1879
@adilkhan1879 2 жыл бұрын
Thank you for giving vedio sir once can ask you what are nutrients of bod like fecl3 and cacl2 and phaspte buffer solution. How we prepared and add in the bod determination method. Plz explain it than you
@maryprajee6882
@maryprajee6882 2 жыл бұрын
Thank you sir, well explained
@SunilKumar-pl9xm
@SunilKumar-pl9xm Жыл бұрын
Excellent explanation
@skeagle5629
@skeagle5629 Жыл бұрын
The video helped a lot with my chemistry IA. It was explained really clearly.
@dilanazozturk5248
@dilanazozturk5248 9 ай бұрын
Hello! Currently I'm also writing my IA on this topic, has yours been marked? Is there any tips you could give me? It would be awesome if you could
@skeagle5629
@skeagle5629 9 ай бұрын
@@dilanazozturk5248 Glad to see a fellow chem student in the same boat. I just finished my draft IA and am still awaiting feedback/marking. But I could use advice just as much as you.😅😅
@gsreekanth7150
@gsreekanth7150 3 жыл бұрын
thank u sir But I have an a small dought, how to calculate do, When burret reading is =13.3 How to calculate please send me the final answer , The normality of sodium thiosulfate is=0.025
@jeasgrejoyandrews2720
@jeasgrejoyandrews2720 3 жыл бұрын
Can you explain why water is added to 400 ml in standardisation?
@user-sv5sy1di3p
@user-sv5sy1di3p 10 ай бұрын
i love this video so muchhhhhh!!!!!!!!!!! Hurrrayyyyy
@muhammadsagheer819
@muhammadsagheer819 2 жыл бұрын
Wonderful
@sekharn1701
@sekharn1701 3 жыл бұрын
Thank you sir
@akhelois6486
@akhelois6486 2 жыл бұрын
thank you for the explanation sir. I have a question sir. why in DO formula, Normal & Volume Na thiosufat times 8000? what 8000 mean? I'm sorry if my english is bad.
@AniList2021
@AniList2021 2 жыл бұрын
I am confused too about the 8000
@rajwantkaur2399
@rajwantkaur2399 3 жыл бұрын
very nicely explained. thanks
@gsreekanth7150
@gsreekanth7150 3 жыл бұрын
Please explain the Calculation part with formula
@yummytummy6952
@yummytummy6952 2 жыл бұрын
Thank you so much
@thepookiepoookie1808
@thepookiepoookie1808 2 жыл бұрын
Can you make a conclusion for this?
@sathishsre4914
@sathishsre4914 4 жыл бұрын
Wowo nice explanation and learned a lot
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
Ok sir
@anilsnikam1956
@anilsnikam1956 3 жыл бұрын
Good sir
@syrusjames3958
@syrusjames3958 3 жыл бұрын
Sir, you said that manganic hydroxide is formed after the first reaction, but it is manganic oxide in the equation. which one is correct?
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
The oxide originally formed is directly in contact with aqueous medium , which directly converts it to Hydroxide (oxide + water = Hydroxide)
@syrusjames3958
@syrusjames3958 3 жыл бұрын
@@TheSingtangpaScienceGuy thank you sir
@vishalmangaraj
@vishalmangaraj 2 жыл бұрын
@@TheSingtangpaScienceGuy so, sir the brown ppt is manganic oxide or manganic hydroxide?
@shraddhatidke6168
@shraddhatidke6168 2 жыл бұрын
each and every step is very well explained.....if possible please also make video on COD
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 2 жыл бұрын
Thankyou. That was my plan. To do COD and BOD as well. But both these experiments require very expensive equipmemts like COD digestor, BOD incubator etc. So i will not be able to make a video on them as of now. My home laboratory is self funded. Not using some college or university lab 🤷🏽‍♂️
@marieslittlekitchen1020
@marieslittlekitchen1020 2 жыл бұрын
What is (0.0125N) sodium thiosulphate in molarity?
@bound2agun57
@bound2agun57 2 жыл бұрын
PLEASE
@saveearth5850
@saveearth5850 2 жыл бұрын
Well explained Sir what's role of MnSo4 and Alkaline iodine azide in DO analysis. Please Do reply Sir?
@supriyapatil2799
@supriyapatil2799 2 жыл бұрын
To avoid the Nitrite interference
@pavithralpavi3221
@pavithralpavi3221 2 жыл бұрын
Tq so much sir
@angelafrancisco4092
@angelafrancisco4092 2 жыл бұрын
good evening. Can you write sir a separate chemical reaction of manganese sulfate + water and alkali-iodide reagent with the solution gained from manganese sulfate and water? Thank youuu
@angelafrancisco4092
@angelafrancisco4092 2 жыл бұрын
I badly need separate chemical equation for educational purposes. Hope you'll read this po. Thank you, sir.
@anushkagupta3566
@anushkagupta3566 2 жыл бұрын
I have followed all your instructions. Yellow ppt is forming and dissolves after the addition of sulphuric acid. But there is no result in titration. No straw yellow colour nor violet colour. My water sample is industrial sewage.
@tokarapapa4654
@tokarapapa4654 Жыл бұрын
I have a same problem my sample is from contaminated stream
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
Take sodium iodide or potassium iodide with sodium hydroxide to make alkaline azide
@khimmanganohoy9023
@khimmanganohoy9023 2 жыл бұрын
what is the final product of all the three (3) reactions in stoichiometric equation?
@RMalai
@RMalai Жыл бұрын
I also wish that final net ionic equation was included. We can do it as well if we just combine the three equations and cancel out the "like" groups.
@jeasgrejoyandrews8694
@jeasgrejoyandrews8694 3 жыл бұрын
why for standardisation, a lot of water is added or diluted to 400 ml
@jeasgrejoyandrews8694
@jeasgrejoyandrews8694 3 жыл бұрын
What reference source you used for this video?
@earth-angel
@earth-angel Жыл бұрын
What is the analyte
@durbadalgoswami
@durbadalgoswami 3 жыл бұрын
Great work. 👍 Help me with one querry. From where did you purchased the BOD bottle? Kindly provide me the link* *If you purchased online Thank you 🙂
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
I bought offline. Its Borosil Brand 300ml capacity. Bit costly.
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
U can also use 125ml for small scale experiment. Saves u money.
@durbadalgoswami
@durbadalgoswami 3 жыл бұрын
Yup you're right. Borosil laboratory glasswares are a bit costly. In our college we are using 250 mL reagent bottles with glass stopper for the estimation of DO2 experiment. Works fine but I wanted to show the original BOD bottle to the students live.
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
@@durbadalgoswami when u used 250 ml reagent bottles, i hope u adjusted the volume of water sample to be pipetted out along with the volume of the reagents to be used accordingly. Otherwise it wud be wrong. Of course, for namesake practical classes, where the main aim is just to give the students an idea of how the process goes, any bottle wont be a problem. But BOD bottles are specially designed with special features for DO and BOD estimation, as i've briefly explained in the video. 300ml is the standard volume. 125ml is the small scale lab volume. Quantities of reagents and samples taken to be adjusted accordingly depending on which bottle capacity taken. If u r in the city, then u have the freedom of choice to buy cheaper alternatives that still does the intended function. U can go for generic borosilicate BOD bottles manufactured by some local brand and sold at much cheaper price than borosil or schott duran etc. Wishing u Good luck 👍🏾
@tokarapapa4654
@tokarapapa4654 3 жыл бұрын
Can I use potatoes' starch?
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
Offcourse
@tokarapapa4654
@tokarapapa4654 Жыл бұрын
@@TheSingtangpaScienceGuy when i add soluble starch solution to my sample the dark blue cplour does not occur. i wonder what is it that am doing wrong
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
Sir, if blue color does not appear in the analysis, what is the meaning of this
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
Blue colour should appear. If not, there must be something wrong with the experiment. Prepare fresh starch solution. Repeat.
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
If you did not even get blue color after making head starch, then what to do
@TheSingtangpaScienceGuy
@TheSingtangpaScienceGuy 3 жыл бұрын
May i know the source of your water sample? Could be due to extremely low O2 in the sample
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
Sir, its chemical preparation is not like any affair
@sumityadav-yd4io
@sumityadav-yd4io 3 жыл бұрын
Maina Chemical Complex has done your method.
@whatchusee3404
@whatchusee3404 Жыл бұрын
Such hard task
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