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This is my first time coming to your channel. I will be going through your videos after I make this comment. I reallyyyyy APPRECIATE you breaking it down this way. I am taking chemistry online because I work full-time. It's been almost near impossible to do well in this course. I have been going through the slides she advised us to reference and I still could not comprehend. I watched your video once and BAM!!! I understand! many many MANYYYYY times THANK YOU!!!!
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i'm not even english but i have an exam on this tomorrow and there are not a lot of these kinds of explaination videos in my language so im glad i found this one :) it was very helpful
l have been asked to compare my RF values to a known value/ literature values l but l don't know how to work out / find the known value and l would appreciate it if you could help me out with this
the solute is dissolved in the solvent, so can only ever reach as far as the solvent front, which means the maximum number can only ever be 1. The solute cannot dissolve in the paper, which is why the solute cannot be in front of the solvent front.
Because normally the solvent front will be a greater distance travelled compared to the distance travelled by the solute dissolved in the solvent. The equation to calculate Rf value is distance moved by solute / distance moved by solvent front. Therefore a smaller number divided by a bigger number always gives a number smaller than 1.
Sir my compounds are non polar compounds. so which solvent do I use for dissove the compound and what solvents do I use in the mobile phase? sir can you tell me a little bit? I am facing a lot of problems in tlc checking
@@FASILHANEEF Hi faisal, thank you for your comment, but you can simplify that by: Rf value = distance travelled by a component / distance travelled by solvent THE Rf VALUE IS ALWAYS BELOW 1!
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You can calculate the Rf value of each individual spot. The Rf values are then compared against a known database of how different substances have travelled in that particular solvent to identify the solute. Hope that helps?
Can the level at which you draw the solvent front determine the Rf value of the compound and if so, does it not make the Rf values differ by 1 or 2cm per person?
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Can we appreciate his printed style drawing like wow that is really good and neat
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Pov: Your exam is coming
facts
Frrrrrr
I’m watching this RN - tmrw is my exam-
I like how he puts questions in the video keep it up !!!!!
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Fantastic explanation. Thank you so much!!!
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good, simple video, helped me revise my concepts fast. Quizzes were spot on helpful!
This is my first time coming to your channel. I will be going through your videos after I make this comment. I reallyyyyy APPRECIATE you breaking it down this way. I am taking chemistry online because I work full-time. It's been almost near impossible to do well in this course. I have been going through the slides she advised us to reference and I still could not comprehend. I watched your video once and BAM!!! I understand! many many MANYYYYY times THANK YOU!!!!
Thank you! Check out kayscience.com for 1000s of FREE quiz questions - hope you enjoy! Here you have access to ALL our videos here, let me know if you’d like a code for 25% off a subscription 😊
Thanksss bro 💯🔥💪👍🙌👏🏅🥇🏆🌟🙏👏💰💰💰😁🙏👏
this is the best video and i now understand thank you
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The best vedio i have seen it is so helpful ! Thanku so much bro 😎 keep it up 👍 gonna copy ur style 🤷♀️❤️
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This is pure genius
thanksnice video
I have my exam in an hour, and I can never understand some stuff, but this video helped so much
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most helpful video ever, i've never understood chromatography before this so thank u sm
Now wait a minute!! Whatt😮😮I really appreciate the editing and how the way he just spoked .Sir you saved my exam tomorrow
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how many decimal places if you calculated the rf value?
i'm not even english but i have an exam on this tomorrow and there are not a lot of these kinds of explaination videos in my language so im glad i found this one :)
it was very helpful
When measuring the height of a spot do you measure to the middle of the spot, the top of the spot or the bottom of the spot?
The middle
Very Informative Video
thank you :) glad you enjoyed it
I m preparing for NEET UG in INDIA this was very helpful to me.....like I got PhD in paper chromatography..... thanks ❤
Thanks bro
I love that pen!
I just used this pen: Uni Pin Fineliner Drawing Pen - Sketching Set - Black Ink - 0.5mm :)
l have been asked to compare my RF values to a known value/ literature values l but l don't know how to work out / find the known value and l would appreciate it if you could help me out with this
Distance moved by solute / distance moved by solvent
This is a very comprehensive discussion and I appreciate the learning assessment in between! Thank you for this!
You are very welcome! Please tell your friends about us :)
Thanks man
How can we determine the molecular mass of the compound from the Rf value? I mean, can we determine the molecular mass from chromatography?
The drawing and explanation wow🤩🤩🤝
What if the solute is above the solvent line. I understand that the rf value is never greater than 1, but how do I figure this out then
the solute is dissolved in the solvent, so can only ever reach as far as the solvent front, which means the maximum number can only ever be 1. The solute cannot dissolve in the paper, which is why the solute cannot be in front of the solvent front.
@@KayScience damn ur smart
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what if the question doesnt say what the distance moved by the ink and the solvent is, how would you divide it if you have no measurements
you wouldn't as there would be no data to use! only calculate Rf data if given the data in the exam
@@KayScience thanks, i was searching up practice questions online, and half of them didnt have any data
Thank you very muuuuuch
Please don't stop ❤️❤️
I like the comprehensive and succinct nature of this video. Helped me understand the topic much better than a 20 minute lecture. Thank you!!!
Why value of Rf is always less than 1
Because normally the solvent front will be a greater distance travelled compared to the distance travelled by the solute dissolved in the solvent. The equation to calculate Rf value is distance moved by solute / distance moved by solvent front. Therefore a smaller number divided by a bigger number always gives a number smaller than 1.
Thanks
You sound like Prof Snape...
Thanks for the video
Sir my compounds are non polar compounds. so which solvent do I use for dissove the compound and what solvents do I use in the mobile phase? sir can you tell me a little bit? I am facing a lot of problems in tlc checking
good video!
☺️☺️☺️☺️
Where to find literature Rf values?
Google :)
this was so clear and helpful, thank you!!!
Hi there, how to find the Rf value for the mixture that with more than one spot? thanks for the video.
Hi, you find the Rf value of each individual spot in a mixture. Each spot in the mixture has its own Rf value. Hope that helps?
@@KayScience thanks, this helps a lot.
Rf value=ratio of distence travelled by a component /to the ratio of distence travelled by the solvent.
@@FASILHANEEF Hi faisal, thank you for your comment, but you can simplify that by:
Rf value = distance travelled by a component / distance travelled by solvent
THE Rf VALUE IS ALWAYS BELOW 1!
@@KayScience okay..thankyou..
you sound like snape
you look like dobby's sock
life saver!
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I saw it 4-5 times but believe it help me alot........ 🙏🙏🙏💐💐
woooooooo :)
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thank u man
Thank u sooo much
❤❤
Better than the useless 1 hour lecture in schools 🏫
Wow l just understood completely l appreciate it
Thank u
excellent
yeah btw question 10 in the ppt answer is wrong it is 0.38
Ur explanation are the best new sub
THIS WAS SO HELPFUL, THANKYOU!
Thank you!
❤ very easy to understand, Thank you so much
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wonderful explanation
Glad you think so! You are very welcome 👍 visit kayscience.com for all of our videos and quizzes to help you with your revision 🔥
Thank you, I didn't even know this was something on the exam until today
20 mins before the exam actually saved me
KayScience
This is a great revision video based around chromatography. Thank you!
You are very welcome!
Thank you so much for this video
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how will you calculate 5th mixture? there are like 3 spots there do we take each spot and calculate or the highest spot?
You can calculate the Rf value of each individual spot. The Rf values are then compared against a known database of how different substances have travelled in that particular solvent to identify the solute. Hope that helps?
@@KayScience how will I name these spots?what do i name them
✨😃🎁 THANK YOU...
your welcome
This video really helped me thank u sooo much
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Super 👌
thank you
You are very welcome! Please tell your friends about us :)
Thanks
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THANK U
You're welcome!
rah my brodda, wanna collab some time???
Simple. Efficient. Questions. Nice voice.
Thanks a lot 😊
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THANK YOU SIR THANK YOU
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Thanks. Perfect video to watch if you want to understand Rf value.
thank you
good video but goofy voice :🤓👺👹🦴👩🦯
Thanks
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Thank you
Thanks
Can the level at which you draw the solvent front determine the Rf value of the compound and if so, does it not make the Rf values differ by 1 or 2cm per person?
Lit
Dun no
😊
Thanks...
Good explanation.
can the RF value contain a unit such as cm or mm?
no! The Rf value has NO units
You really helped me ❤️
Too much helpful really greatful to you
Thanks alot
so glad it helped you! :) head over to kayscience for all our videos and self-marking quizzes
Thanks❤️
Nice explanation =w= Have a great day and thank u owo
uwu
Didn't know that Stitch taught in chemistry