Alkalinity of water (Phenolphthalein and Methyl orange alkalinity)

[@dhanyashree3360]

I'm a chemical Engineering student, we have this experiment in pollution control lab, i never understood what happened in this experiment, even my teacher just said to follow the procedure. tomorrow i have exam and I'm happy that i came across this video, i understood the concept also. thank you mam.

[@RevathiPurushothaman]

It's my pleasure. Thanks.

[@dhanyashree3360]

@@RevathiPurushothaman mam i got the same experiment today, glad that i watched your video.

[@dhanyashree3360]

@@RevathiPurushothaman For my semester lab exam again i watched this video. I'm so glad that i understood this even better. So so thankful to you mam.

[@SanthoshKumar-lw8wn]

In Which college ur studying CHE?

[@dhanyashree3360]

@@SanthoshKumar-lw8wn MSRIT Bengaluru

[@ndheeraj]

Thank u very much mam for clearing my doubts through this video...
Please do more such videos which are useful for engineering students...

[@RevathiPurushothaman]

Sure. Thank you.

[@factfigures1456]

i have not learned this entire knowledge from my college proffesor in whole sem and i got it in just 20 min ....thanks a lot mam

[@RevathiPurushothaman]

I am very happy that it helped you. Thanks.

[@mahanteshjalawadi6010]

Thank you very much for explaining detail about alkalinity

[@RevathiPurushothaman]

It's my pleasure.

[@mahanteshjalawadi6010]

Madum as I am WTP chemist in sugar factory .. so whatever clips about chemistry is very helpful for me so request you upload more and more about chemistry and my colleagues also subscribe for your channel . If any doubt for us means we don't have any contact so if you are free means can you send calibration details of laboratory to email [e-mail]
And thank you very much madum🙏

[@pawan19]

Thank u so much mem. this really helpfull me.

[@RevathiPurushothaman]

It's my pleasure.

[@muneebraza3643]

I want more practicals like that

[@RevathiPurushothaman]

Sure. In future

[@aro8685]

I'm gonna have to watch this video a couple of times to truly digest it.

[@arjinajana2459]

Beautiful, detailed, well organized and presented, easy to understand....
Thank you ma'am.❤️

[@RevathiPurushothaman]

Is my pleasure

[@prakharsingh1999]

Wow mam your explation is just awesome

[@RevathiPurushothaman]

Thank you so much.

[@starlordhero1607]

Most underrated

[@RevathiPurushothaman]

Thanks.

[@edwardjones3885]

Thank you for the video. Would it be possible to use the same methods to test the alkalinity of aquarium water (with relatively low carbonate contents) ?

[@RevathiPurushothaman]

Sure.

[@edwardjones3885]

@@RevathiPurushothaman I tried titration using 0.02mol sulfuric acid and aquarium water and for some reason there was no color change..

[@jalanshimotisha4704]

Thankyou ma'am . It's very clear and easy to understand for phinolphthalain & methyl organge used as indicator and titration with 0.02 N H2SO4 solution

[@RevathiPurushothaman]

Thank you. It's my pleasure.

[@asmabanun8120]

The best video never seen before.
Thank you so much mam

[@RevathiPurushothaman]

It's my pleasure. Thank you.

[@asmabanu585]

@@RevathiPurushothaman
Mam my effluent sample pH 9.2
For P end point = 9.3 ml
M end point = 64.7ml
Normality of Acid = 0.1N
Sample volume taken = 10ml
My answers are
Hydroxide alkalinity - 23,050 ppm
Carbonate alkalinity - 55,400 ppm
And
Bicarbonate alkalinity - 32,350 ppm (Total alkalinity)
Is this value correct mam

[@sanyabhatt2367]

thankyou so much mam...........i mean sucha great explanation.
no need to rewind etc. i got everything in one go. thanks man. please make more experiments video. have a beautiful life:)

[@RevathiPurushothaman]

It's my pleasure. Theak you very much.

[@hitendrakumhare1757]

your voice and explanations is very good , ppt also too good i am understanding easily

[@RevathiPurushothaman]

Thank you very much.

[@pradeepmali8543]

Ma'am you are the genius.🙏🙏

[@RevathiPurushothaman]

You too 😊

[@rohitbanate7629]

Thank you so much ma'am, very well explain in detail. One more help needed from you regarding fecal coliform test of wastewater.

[@RevathiPurushothaman]

It's my pleasure. I am not aware of that test.

[@RevathiPurushothaman]

It's my pleasure. I am not aware of that test. Sorry.

[@AmitChauhan004]

Very nice information 👏

[@RevathiPurushothaman]

Thank you very much.

[@070devmahajan2]

You are saviour of my 1 sem in college

[@RevathiPurushothaman]

Thank you so much. It's my pleasure.

[@qwerty-nx4ed]

Thank u so much. I cant explain how happy I am.

[@RevathiPurushothaman]

Now, I can't explain how happy I am. Thank you.

[@dhwaniramawat]

Ma'am just saw your lectures and the way you teach.... OMG! I'm flattered, how easily you teach it,all my doubts are cleared and kudos! I'm your new subscriber 😉😁

[@RevathiPurushothaman]

Thanks for your compliments. It's pleasure.

[@Ayush_jaiswal19]

Thank you sooo much ma'am how easily and Comfortably you Taught the concepts. I m ready for my viva Tomorrow. keep uploading more such experiments of engineering chemistry

[@RevathiPurushothaman]

Thank you so much. I get motivated with your feedback.

[@achal4203]

Thank you so much mam great teaching and simple way mam

[@RevathiPurushothaman]

It's my pleasure.

[@shripaddeshpande1333]

Excellent explanation 👍🏻👍🏻

[@RevathiPurushothaman]

Thank you very much.

[@pillasatyanarayana4654]

Fabulous explaination mam.Thank you so..ooo..oo..much mam..

[@RevathiPurushothaman]

Its my pleasure. Thanks for your support.

[@chiragjaiswal5911]

Best explanation of alkalinity determination

[@RevathiPurushothaman]

Thank you.

[@priyankavasam07]

Very well explained..It used to be very confusing topic but after watching this video I got clear idea of concept and applications. Thank you @revathi purushothaman it helped a lot in my sem xam preparation.

[@RevathiPurushothaman]

It's my pleasure. You are most welcome.

[@Rushesweet1]

thank god for this video.Miss, i understood everything you said...

[@RevathiPurushothaman]

You are most welcome

[@antaradas4669]

Wow... Excellent teaching 🙏

[@RevathiPurushothaman]

Thank you.

[@lakshmanamohan5979]

Clarity classification and cute teaching approach

[@RevathiPurushothaman]

Thank you very much.

[@himanshitanwar7907]

Thank you so much for this wonderful explanation ❤

[@RevathiPurushothaman]

It's my pleasure. You are welcome.

[@sk_sahu]

I was stuck in this but really ur video helped me a lot😊❤️

[@RevathiPurushothaman]

Its my pleasure.

[@riyajain4545]

Amazingly explained mam!! It cleared my all doubts about the calculations!! Thanks a lot❤️

[@hindustanimulticuisine3699]

I am happy that it helped you.

[@riyajain4545]

Great work mam!!👍🏻

[@bharatbhushan8191]

Thank you ma'am..Very nice explanation

[@RevathiPurushothaman]

Thanks. Most welcome.

[@safed_channel]

Finally after watching so many videos on youtube I got the best which cleared all my concepts of this topic.
Thank you so much

[@RevathiPurushothaman]

I am happy that you liked it. Most welcome.

[@chandrasekaranmuthukumar3942]

Wonderfully explained madam. thank you very much.

[@RevathiPurushothaman]

Thanks. Most welcome.

[@manishavikalp798]

Explained very well.. thank you ma’am

[@RevathiPurushothaman]

Its my pleasure.

[@garv2003]

Thank you ma'am . Cleared all my concepts Please keep adding more videos for eng. Students

[@RevathiPurushothaman]

Thank you very much. Sure.

[@svvoice8318]

Thanks a lot of u Ma'am...

[@RevathiPurushothaman]

It's my pleasure.

[@routhuneelima8810]

Very good video... Solves all the doubts regarding alkalinity..

[@RevathiPurushothaman]

Thank you.

[@VinayHivrale26]

Great lecture to the point

[@RevathiPurushothaman]

Thank you very much.

[@davidcardinal3654]

Great video. Our plant operations manual doesn’t explain this very well.

[@RevathiPurushothaman]

Thank you very much.

[@rachakatlanikhitharaj3254]

Great explanation that makes us happy 👍

[@RevathiPurushothaman]

Thank you. Glad that you liked it.

[@vikaspal9098]

Thank u mam, u explained each n every thing .

[@RevathiPurushothaman]

Your are most welcome.

[@theexecutioner8181]

Can methyl orange indicator be used first?

[@RevathiPurushothaman]

Yes. But it will give us only the total alkalinity. You cannot calculate the individual alkalinities.

[@satyapriyapradhan3570]

Thank you mam for clearing the mechanism beyond this experiment.
Please do more videos regarding Various experiment

[@RevathiPurushothaman]

Sure. I am glad it helped you.

[@gradientO]

Well explained

[@RevathiPurushothaman]

Thank you.

[@AnkitRaj-jn6yn]

Thanks Ma'am. It is very helpful.

[@RevathiPurushothaman]

Glad that it helped you.

[@sandeepvuppala1332]

Tq for video and please tell the if any alkalinity in water, what the causes and remidies in waste water

[@RevathiPurushothaman]

Alkalinity comes from the minerals present in the water, which is obtained from various sources. You may watch 'Drinking water treatment video' The Alkalinity can be removed by Demineralisation, or any other water treatment methods. Watch those videos.

[@prakashaathi556]

mrthylorange alkanity and toltal alkanity present water is both are same?
determination of acidity is titration with base is it correct ?

[@RevathiPurushothaman]

Yes you are correct.

[@akshaywadikar9883]

I think these r the only videos which r clearing my doubts at every point..👌👌

[@sejaladhikari64]

Thank you so much ma'am

[@RevathiPurushothaman]

Most welcome.

[@gowgli15]

Good stuff

[@RevathiPurushothaman]

Thank you.

[@mdsolayman9987]

Its really amazing speech.

[@RevathiPurushothaman]

Thanks for your compliments.

[@haldharsahu4404]

Can I use HCl in place of H2SO4

[@RevathiPurushothaman]

Can use.

[@nikhilmaid2670]

ThanKq mam its very helpfull

[@RevathiPurushothaman]

Glad that it helped you.

[@karanjamwal5591]

Mam how can we calculate/express bicarbonate and carbonate. We have to add equivalent weight of carbonate and bicarbonate in the formula ?

[@RevathiPurushothaman]

No. We are calculating in terms of CaCO3. So we are multiplying with its equivalent weight 50. The formula we have used.

[@karanjamwal5591]

@@RevathiPurushothaman thank you mam. Can we also calculate bicarbonate as bicarbonate (formula) if we have to calculate bicarbonate only and not bicarbonate alkalinity....

[@techstuffs267]

Very good explanation

[@RevathiPurushothaman]

Thank you

[@dharmeshbhagwagar5240]

Thank you mam
It was indeed much helpful 🙏🏻

[@RevathiPurushothaman]

Most welcome.

[@RevathiPurushothaman]

Glad that it helped you.

[@gsreekanth7150]

What is the difference between Ph alkalinity and mo alkalinity mam

[@RevathiPurushothaman]

It means you have not watched the the video properly.MO alkalinity is the total alkalinity. Ph A indicates the neutralisation of hydroxide and half of carbonate only

[@mr_aryan_vlogger9629]

Very nice setion

[@RevathiPurushothaman]

Thank you.

[@uzairbaig3154]

how will the equation change when we take strength of acid as Molarity?

[@RevathiPurushothaman]

Instead of equivalent weight of calcium carbonate, molecular weight should be used.

[@muhammadowais2873]

Awesome video mam , the things which I was searching on whole interest was in one video

[@RevathiPurushothaman]

Thank you.

[@monithasaichinnala8141]

Thank you mam
It was indeed much helpful..🙏

[@RevathiPurushothaman]

Most welcome. Happy that it helped you.

[@clas292]

Good day maam how do we compute normality of H2SO4?

[@haal2777]

What is theall precautions of this experiment

[@RevathiPurushothaman]

Should be careful in identifying reddish orange or pink colour at the methyl orange end point.

[@Mr.patel1111]

Can u provide this pdf? Btw very good explanation mam ty

[@RevathiPurushothaman]

Thank you.

[@k.deepthireddy1489]

Mam we should refill the burrete again during methyl orange titration

[@RevathiPurushothaman]

No, you can continue the titration from phenolphthalein end point. Even if you fill the burette, you will get the same value. We need not waste the solution.

[@theladyera]

Hello Mam, how do you calculate if the condition is P=1/2M...for carbonate ions?

[@sureshdevi8997]

Thank u mam i want some more practical s also

[@RevathiPurushothaman]

sure.

[@ganeshkumarvasudevan5758]

Superb mam, thank u

[@RevathiPurushothaman]

It's my pleasure.

[@sameershrestha7818]

the bases are neutralized and a neutral water is formed then
Why is the end point 4.3 instead of 7?

[@RevathiPurushothaman]

The pH at end point will not be 4.3. It will be slightly acidic, because a drop of acid will be added more after neutralisation.

[@tierskothierry3297]

Thanks very much for this

[@RevathiPurushothaman]

It's my pleasure.

[@ankushdongre8004]

If pH of water sample is below 8.3
Than we can start from methil orange indicator.

[@ishikagarg2446]

Mam why we don't use only methyl orange

[@RevathiPurushothaman]

Methyl orange will give only total alkalinity. If you want calculate alkalinity due to individual ions, we need to use both phenolphthalein and methyl orange. Go through the video carefully. It is explained clearly.

[@ishikagarg2446]

@@RevathiPurushothaman thank you mam

[@TT98942]

Madam, alkanity processor vendum 🙏

[@safanazim9745]

Methyl orange neutralizes complete hydroxide and complete carbonate only right?why to mention bicarbonate separately when it is already included in the complete neutralization of carbonate.....
And also if bicarbonate is not included in the complete neutralization of carbonate then why do you take half carbonate in phenolphthalein alkalinity?

[@RevathiPurushothaman]

1) Go through the video carefully again. It means that whatever the combination, all of them will be neutralized with methyl orange indicator.
2) Neutralization with phenolphthalein includes complete hydroxide and first step of carbonate forming bicarbonate (slide 9), because bicarbonate neutralizes below pH 8.3, which will not be indicated by phenolphthalein. Hence half of carbonate.

[@vaibhavsrivastava6655]

Mam, why do we need two indicators in this experiment

[@RevathiPurushothaman]

Check the slides showing the pH range of the indicators. You will understand.

[@vaibhavsrivastava6655]

Bcz the first two neutralization reaction occur in ph range of 8 to 10 and phenolphthalein changes color in the corresponding ph range, below this range phenolphthalein will be colorless and we cannot see the visibility of bicarbonate ions when their end point occurs at ph of 4 to 5

[@vaibhavsrivastava6655]

Right mam?

[@asmabanun8120]

Sample volume = 10ml; Normality of acid = 0.1N
Effluent pH 9.2
P end point - 9.3ml
M end point - 74ml ( total alkalinity)
Alkalinity values are
Hydroxide alkalinity - 27,700 ppm
Carbonates alkalinity - 64,700 ppm
Bicarbonate alkalinity - 37,000 ppm
Is this correct mam

[@RevathiPurushothaman]

M value is too high. There is no correlation between P and M values. It is an hypothetical value.

[@vaishnavejp9247]

THANKYOU SO MUCH MAAM!!!!

[@RevathiPurushothaman]

Most welcome. It's my pleasure.

[@RajeshKumar-iu5gd]

OMG Samy way please explain SULPHIDE TEST , TOTAL HARD, CA HARDNESS TEST , CHLORIDE TEST

[@sidhantghosh9050]

mam what would happen if we do it with methyl orange with no phenolphthalein??wouldn't it be same?

[@RevathiPurushothaman]

Without phenolphthalein, only methyl orange will give the total alkalinity. We cannot find the individual alkalinity

[@sidhantghosh9050]

individual alkalinity as in of individual compound as OH-,CO32-,HCO3-?

[@RevathiPurushothaman]

Yes.

[@sidhantghosh9050]

thanks mam

[@RevathiPurushothaman]

Most welcome.

[@omdalavi80]

this helped me a lot .

[@RevathiPurushothaman]

Thank you very much.

[@thotapragnya278]

Thank you mam😊

[@RevathiPurushothaman]

You are most welcome.

[@rajclasses2]

Pls show to me practical of water of Alkinity

[@RevathiPurushothaman]

sure.

[@shivaallinone6029]

Why phenpthalline is added first in the water sample why methyl orange is not

[@RevathiPurushothaman]

Methyl orange neutralises all the ionic species, but phenolphthalein neutralises only hydroxide and 1/2 carbonate. If you add methyl orange first, you cannot determine the individual concentration,

[@himadrishekharsarker2422]

wonderful

[@RevathiPurushothaman]

Thank you.

[@rahultomar7388]

Good

[@RevathiPurushothaman]

Thanks

[@nishathtabassuma3676]

Plz increase the voice quality...

[@RevathiPurushothaman]

Already improved in next videos

[@viswabalan6910]

Thank you so much mam

[@RevathiPurushothaman]

It's my pleasure

[@diyaazaghloul756]

Good sir

[@RevathiPurushothaman]

Thank you.

[@Officialpintulalsriwastav]

Thanks

[@RevathiPurushothaman]

Most welcome.

[@muneebraza3643]

Can you recommend me a UA-cam channel ?

[@geyasuddin3007]

Please,tell me How to measure table salt alkalinity.

[@shivanmaharaj2662]

It's a good presentation however I feel certain places, it's just stated rather than explaining why you are making that statement.

[@muruga642]

You are tamilnadu

[@RevathiPurushothaman]

Yeah.

[@nithishtech143]

Mam tamil la konjam explain pannunga

[@RevathiPurushothaman]

It should reach every one globally.

[@Abhinavsingh-eq9wd]

❤️

[@RevathiPurushothaman]

Thanks

[@basujain8928]

Got it

[@RevathiPurushothaman]

Thanks.

[@alexpastrano651]

BE MY PROF HUHUHU

[@RevathiPurushothaman]

By subscribing to this channel, you already became my student 😉

[@kenziro4927]

Binod was here

[@arnabhreja4608]

P=.5M and beyond not proper explanation just read what has been written there ...