Derivation of Beer Lambert law: Spectroscopy/Analytical techniques/Photochemistry

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Derivation of Beer Lambert law: Spectroscopy/Analytical techniques/Photochemistry

Рет қаралды 64,103

Күн бұрын

Statement and derivation of Beer-Lambert's law is explained in detail with illustrations. Mentions the limitations of Beer-Lambert's law. Applications of Beer-Lambert's law.The Beer-Lambert law, also known as Beer's law, the Lambert-Beer law, or the Beer-Lambert-Bouguer law.
Beer- Lambert’s Law
You will be able to
state and derive Beer-Lambert’s law
list out the limitations of this law.
discuss the applications of this law.
Note: Solve problems based on this law in the next session.
When a monochromatic light is passed through a solution containing the absorbing substance, the decrease in the intensity of light with path length is proportional to the concentration of the solution and the intensity of light.
Beer-Lambert law : Derivation
Integrating on both sides between the limits
I=Io when l=0 and I=I when l=l
Molar extinction coefficient
or
Molar absorption coefficient
e is a function of wavelength
It is suitable only for monochromatic light.
It is not suitable for higher concentration as there is deviation in e.
Scattering of light due to presence of particulate matter.
If the sample is fluorescent or phosphorescent.
Applications of Beer-Lambert law
To determine the unknown concentration of known solution
Ak -Absorbance of known solution
Au -Absorbance of unknown solution
ck -concentration of known solution
cu -Absorbance of unknown solution

Пікірлер: 90

@adithiv3050 5 жыл бұрын

Wow you are the sweetest and best lecturer on KZfaq. I felt so nice while listening to it and not once did I lose my concentration.

@RevathiPurushothaman 5 жыл бұрын

Thank you very much for your generous compliments.

@sakshinainwani7803 4 жыл бұрын

best lecture on lambert beers law. thanku mam ❤

@RevathiPurushothaman 4 жыл бұрын

Thank you.

@joserobing661 2 жыл бұрын

Vivid, clear , very useful presentation. Continue your service to society

@RevathiPurushothaman 2 жыл бұрын

Thank you very much. Sure.

@venkatramanan3068 4 жыл бұрын

Awesome lecture with very simple language thank you mam...

@RevathiPurushothaman 4 жыл бұрын

Most welcome.

@na-chan163 4 жыл бұрын

Thank you for using English as your medium, this has helped me!

@RevathiPurushothaman 4 жыл бұрын

Most welcome.

@reshu6012 3 жыл бұрын

1 hour class is finished with 13 mins it is easy to understand mam tq u mam

@RevathiPurushothaman 3 жыл бұрын

It's my pleasure.

@sivasree8410 5 жыл бұрын

No words to express...I subscribed...thank u....very good explanation...

@RevathiPurushothaman 5 жыл бұрын

Thank you.

@derricktumuhairwe2052 2 жыл бұрын

Thanks, it was a very helpful Video..... Now can derive this monster. Do you have some prepared calculations numbers for this law

@RevathiPurushothaman 2 жыл бұрын

Thank you very much. I do have some problems. We will try in next video.

@snithya6049 4 жыл бұрын

Thank you madam for such a good presentation on derivation of Beer Lambert's equation in a simple way

@RevathiPurushothaman 4 жыл бұрын

Happy that you liked it. Most welcome.

@hoorlala1567 8 ай бұрын

Assalam o alikum mam your lecture was very helpful. Jazakh Allah! Mam i want to say that there is some mistake in applications of beer lambert's law, in place of unkown concentration you have written unkown absorption, kindly correct it and if you knew it so kindly accept my words as i have fully understand your lecture. Jazakh Allah!

@RevathiPurushothaman 7 ай бұрын

Thank you so much for your obliging words. I will look into it.

@emmanuelmarvelous9526 Ай бұрын

Maamm! Thank you so much!!!!

@RevathiPurushothaman Ай бұрын

It's my pleasure.

@pranathipriya204 3 жыл бұрын

the session is very useful and madam you made me understand it very easily...

@RevathiPurushothaman 3 жыл бұрын

I am happy that you liked it and understood.

@nihaalsinghbhogal4837 2 жыл бұрын

Fallen in love with your content, subscribed!

@RevathiPurushothaman 2 жыл бұрын

Thank you. It's my pleasure.

@ashabhumza3394 4 жыл бұрын

Superb explanation 👏 you have one more fan of yours now.!

@RevathiPurushothaman 4 жыл бұрын

Thanks for your compliments.

@ankitasamal8067 3 жыл бұрын

This video was very helpful... Thank you so much for the derivation.

@RevathiPurushothaman 3 жыл бұрын

Glad that you liked it. Most welcome.

@sakshimadhusudanmantri7938 3 жыл бұрын

Pls suggest book for spectroscopy and chromatography enough for competitive exam like gpat and easy to learn

@05abhijeetrajput72 2 жыл бұрын

Analysis by Chatwal

@thenarasan9043 7 ай бұрын

Best lecture mam 💯💯💯

@RevathiPurushothaman 7 ай бұрын

Thank you so much.

@Ameenarahmathullah 2 жыл бұрын

Wonderful explanations.

@RevathiPurushothaman 2 жыл бұрын

It's my pleasure. Thank you.

@kavanthakur5788 5 жыл бұрын

Very nicely explained in simple language

@RevathiPurushothaman 5 жыл бұрын

Thank you

@sudiptabepari3290 5 жыл бұрын

The video is awsome... It helps me a lot.

@RevathiPurushothaman 5 жыл бұрын

Thank you.

@prachisingh4379 5 жыл бұрын

Your video helped me a lot thank you so much mam 💕

@RevathiPurushothaman 5 жыл бұрын

thank you.

@tusharsirschemistry 5 жыл бұрын

Mam watched thrice... excellent video n subscribed also

@RevathiPurushothaman 4 жыл бұрын

Sir, Thanks for you continuous motivation.

@kritikakewat6265 5 жыл бұрын

Explained well. Thanks.

@RevathiPurushothaman 5 жыл бұрын

Thanks

@Captainlab01 4 жыл бұрын

Such a great explanation wow thanks mam

@RevathiPurushothaman 4 жыл бұрын

Thank you. Most welcome.

@ayeshakhalid4994 Жыл бұрын

How -dI and I are directly proportional?can you plz explain it

@RevathiPurushothaman Жыл бұрын

They are not directly proportional. dl represents the incremental change in the intensity with the change in the pathlength.

@rahulraman4006 4 жыл бұрын

Superb explanation ma'm !!

@RevathiPurushothaman 4 жыл бұрын

Happy that you liked it. Thank you.

@riizwansaiyed 4 жыл бұрын

Hello mam It's been a year ago when you uploaded this but I just went through this video n it helped me alot. Thankyou very much mam for this making much knowledgeable n quiet understandable. May I know if deviations of Beer's and Lambert's law has been uploaded or not?

@RevathiPurushothaman 4 жыл бұрын

Thanks for your compliments. I haven't done.

@rithikarashmi6854 4 жыл бұрын

I feel very easy after listening this video mam tq for making it ease 🙏

@RevathiPurushothaman 4 жыл бұрын

Glad that you liked it. Most welcome.

@bambangkiranadi2576 3 жыл бұрын

Lovely

@RevathiPurushothaman 3 жыл бұрын

Thank you.

@kadirvel5839 4 жыл бұрын

Very good explanation mam

@RevathiPurushothaman 4 жыл бұрын

Thank you.

@prakritidhungel6301 5 жыл бұрын

thankyou mam so much for this great video😍🙏

@RevathiPurushothaman 5 жыл бұрын

Most welcome

@subhampanda3067 5 жыл бұрын

Is there any unit for molar absorptivity constant ?

@RevathiPurushothaman 5 жыл бұрын

concentration-1 length-1- eg dl.mole^-1.cm^-1 or M^-1.cm^-1.

@uppusrinivas719 5 жыл бұрын

Well explained,thanks Mam,,

@RevathiPurushothaman 5 жыл бұрын

Most welcome

@uppusrinivas719 5 жыл бұрын

Mam plz I want wood ward fisher rules

@jayvarunjay8272 4 жыл бұрын

Thanku

@RevathiPurushothaman 4 жыл бұрын

Most welcome

@pavanyerraboina 3 жыл бұрын

Tqsm madam

@RevathiPurushothaman 3 жыл бұрын

It's my pleasure.

@bgmiwithme3092 5 жыл бұрын

Nice video mam thank you

@RevathiPurushothaman 5 жыл бұрын

Most welcome.

@akhila3416 5 жыл бұрын

Really helpful

@RevathiPurushothaman 5 жыл бұрын

Thank you.

@joygoursahaaungon6719 4 жыл бұрын

why - dl proportional to I?? Plz describe.

@RevathiPurushothaman 4 жыл бұрын

Not dI, the decrease in the intensity of light with path length (-dI/dx) is proportional to the intensity of light because the concept depends on the intensity of the light coming from the source.

@tusharsirschemistry 5 жыл бұрын

Nice one mam

@RevathiPurushothaman 5 жыл бұрын

Thank you sir