Next Video: ua-cam.com/video/V1WSesBeURw/v-deo.html Chemistry PDF Worksheets: www.video-tutor.net/chemistry-basic-introduction.html Final Exams and Video Playlists: www.video-tutor.net/
Man Organic Chemistry Tutor you are really awesome!! I had a MC final today and I got a 90% in AP Chem and it is completely because of you!!!!!!!!!!!!!
thank you for making these videos.. seriously, so helpful! i never like them because i'm always in a stress trying to do homework or something but truly thank you so much!!!!
I just had a Chemistry lab where i needed to take a spectrum of 2 solotions one is known and the other is unknown an on he bases of the absorbance i needed to calculate the concentration of the unknown but didt have an idea and i found this so big thanks!!!
chlorophyll amolar mass of 902.5 g/mol absorbs strongly a 660 nm. At this wavelength it was found that a chlorophyll asolussion in acetone of concentration 11 ug/cm^3 in a glass cell of length 1.00 cm transmitted 12.5% of the incident light What is the concentration of chlorophyll in mol/L. Determine the molar extinction coefficient for chlorophyll. Solution for this problem?
A sample of K2SO4 of total mass 40.7 g contains KMnO4 as an impurity. The molar absorptivity E of KMnO4 is 1.80 ⇥ 104 L mol1cm1 at 520 nm. The sample is dissolved in 5.00 ⇥ 102 mL of water. Then, 2.00 mL of this solution are placed in a cuvette with 1.00 cm optical path and a UV-Vis absorption spectrum is recorded, displaying a maximum at 520 nm with transmittance value of 18.6%. Calculate the mass percentage of the KMnO4 impurity present in the initial sample, assuming that K2SO4 does not contribute to any absorption at 520 nm.
I was confused a little bit. for the letter b question, shouldn't i recalculate molar absorptivity with the new given molar concentration (0.65M) as well, before I proceed to the absorbance computation?
I love this video...❤❤❤ the transmittance of a solution is found to be 35%. what is the transmittance if the solution is diluted by half? Please help with this homework...
Thank you very much for this. God bless you But I want to ask...what if in another calculation, you don't get the y-intercept to be zero? That will make it a problem in relating the absorbance relation with the line relation. How do you solve that problem?
Laser radiation with a wavelength of 720 nm hits a homogeneous surface with a power density of 1 W/cm² Medium. After penetrating 10 cm into this medium, the radiation has only one intensity of 0.904 W/cm². Which medium is it? can anyone please guide about this equation?
Hello! For my physics class, I had to do an experiment to demonstrate Beer's law. I used a light sensor which gave results on lux (unit of measure for iluminance). Would it be correct to use measurements in lux instead of W/m2 to calculate transmittance? I'm thankful for any help I can get :)
there is an inconvenience that I want to point out whenever he displays the question I want to pause and think of it but youtube interrupts the top of the question by putting the title of the video
1. An analyst determines the concentration of potassium in five replicates of a standard water sample with an accepted value for its potassium concentration of 15 ppm by Flame Atomic Emission Spectrophotometry technique. The results he obtained in each of the five analyses in ppm were: 14.8, 15.12, 15.31, 14.95 and 15.03. Classify the error in the analysis described above for the determination of potassium in the standard water sample as determinate or random. Please help me
A determinate error can be further categorized into two: constant determinate error and proportional determinate error. Constant determinate error (ecd) gives the same amount of error independent of the concentration of the substance being analyzed, whereas proportional determinate error (epd) depends directly on the concentration of the substance being analyzed (i.e., epd = K C), where K is a constant and C is the concentration of the analyte.
Next Video: ua-cam.com/video/V1WSesBeURw/v-deo.html
Chemistry PDF Worksheets: www.video-tutor.net/chemistry-basic-introduction.html
Final Exams and Video Playlists: www.video-tutor.net/
For me, nobody beats you when it comes to teaching, especially information to do with mathematics. Clearly and understanding explanations👍👏👏👏
@Kashton Karson he's good
Oh
You have been such a lifesaver! I need more professors like you.
Who?
Man Organic Chemistry Tutor you are really awesome!! I had a MC final today and I got a 90% in AP Chem and it is completely because of you!!!!!!!!!!!!!
thank you for making these videos.. seriously, so helpful! i never like them because i'm always in a stress trying to do homework or something but truly thank you so much!!!!
انا م عارفه بدونك كنت حعمل شنوو امتحاني بكره و حقيقي فهمت 😭❤️بحبك😭❤️
"Let me draw a better light bulb" man this guys a legend
For me I admit you are the greatest of all time in teaching simplifying and Explaining in super genius way woow.Thanks alot
Thanks again 💯👏🤝✍
Well you just saved my daughters chem test. Haha. Thank you.
I just had a Chemistry lab where i needed to take a spectrum of 2 solotions one is known and the other is unknown an on he bases of the absorbance i needed to calculate the concentration of the unknown but didt have an idea and i found this so big thanks!!!
such helpful videos full of clarity! May Allah bless you abundantly Ameen!
thankyouu
The most delicious law ever conceived!
chlorophyll amolar mass of 902.5 g/mol absorbs strongly a 660 nm. At this wavelength it was found that a chlorophyll asolussion in acetone of concentration 11 ug/cm^3 in a glass cell of length 1.00 cm transmitted 12.5% of the incident light
What is the concentration of chlorophyll in mol/L. Determine the molar extinction coefficient for chlorophyll.
Solution for this problem?
Thank you very much. You're indeed a great teacher. Well explanatory, simpler and easy. God will increase you in knowledge.
Question: at 10:56 why are we subtracting y with 0,072 shouldn't we divide it instead, since m is multiplied with x ?
Love this guy he is such a blessing long live organic chem tutor🎉😊❤
You are literally the best tutor on the earth!!!
I GET SO EXCITED WHEN I WATCH UR VIDS CUZ I FINALLY UNDERSTAND THANK YOU
i have no idea how you do it but you make med school bearable ...thankyou
One of the highest quality lecture on youtube (requesting to increase the volume of the audio)
I'm glad you found your calling Will Hunting.
Is that his name?
Reference to the movie “Good Will Hunting”
this time you are an angel for me .thank you so much sir
big up brother........may God continue blessing you with knowledge
Just discovered where my professor got his example from 😀
Hopefully he brings his test from here too 😀
Thank you for this. It's quite explanatory.
Thank you so much. This video really helped me with my Lab problem that I was stuck on.
You gained a new subscriber :)
thank you very much...for good explanation and good give example...
you literally saved my life, thanks for the video!❤️
MAR3 TAMBAY KA RIN DITO HAA
@@angeloubajacan3689 OYY FRIEND HAHAHAHA OO NAMAN
A sample of K2SO4 of total mass 40.7 g contains KMnO4 as an impurity. The molar absorptivity E of KMnO4 is 1.80 ⇥ 104 L mol1cm1 at 520 nm. The sample is dissolved in 5.00 ⇥ 102 mL of water. Then, 2.00 mL of this solution are placed in a cuvette with 1.00 cm optical path and a UV-Vis absorption spectrum is recorded, displaying a maximum at 520 nm with transmittance value of 18.6%. Calculate the mass percentage of the KMnO4 impurity present in the initial sample, assuming that K2SO4 does not contribute to any absorption at 520 nm.
I was confused a little bit. for the letter b question, shouldn't i recalculate molar absorptivity with the new given molar concentration (0.65M) as well, before I proceed to the absorbance computation?
Thank you very much, the explanation is very wonderful. Greetings to you from Iraq🙋🏻♀️
Thank you much for helping my tutor
Thanks for your explanation
You are the best 🥺🥺 , thank you sooo much 🙏🏻🙏🏻
Your the best 😍
Life saver! Thank you sm
I love this video...❤❤❤
the transmittance of a solution is found to be 35%. what is the transmittance if the solution is diluted by half?
Please help with this homework...
Question on part 13:17. How do you find concentration when you only have the slope and y-intercept for y=mx+b?
You got the relation between Absorbance and Concentration. So, use that to solve for values of either Absorbance or Concentration.
Thank you for the awesome video
Helpful video. Thank you!
In what units do you measure intensity?
I needed this for biology I have an exam today😩
If I have A and I wanna find T, how do I calculate ? T=-log A?
Express the following absorbance value in terms of percent transmission 0.765
How can I solve the problems?please
Thank you very much!
Thank you very much for this. God bless you
But I want to ask...what if in another calculation, you don't get the y-intercept to be zero?
That will make it a problem in relating the absorbance relation with the line relation.
How do you solve that problem?
Laser radiation with a wavelength of 720 nm hits a homogeneous surface with a power density of 1 W/cm²
Medium. After penetrating 10 cm into this medium, the radiation has only one intensity
of 0.904 W/cm². Which medium is it? can anyone please guide about this equation?
thankyou once again for ur help king
Hello! For my physics class, I had to do an experiment to demonstrate Beer's law. I used a light sensor which gave results on lux (unit of measure for iluminance). Would it be correct to use measurements in lux instead of W/m2 to calculate transmittance? I'm thankful for any help I can get :)
Oh
Why would you not have to recalculate the molar absorptivity for part B?
Problem 2
Thanks a million sir...
I have a doubt. If I want the absorbance of a compound trapped in a micelle, will the micelle affect it?
The best ever. Could you please make a video on FTIR and its interpretation, NMR and isothermal titration calorimetry (ITC).
there is an inconvenience that I want to point out whenever he displays the question I want to pause and think of it but youtube interrupts the top of the question by putting the title of the video
1. An analyst determines the concentration of potassium in five replicates of a standard water sample with an accepted value for its potassium concentration of 15 ppm by Flame Atomic Emission Spectrophotometry technique. The results he obtained in each of the five analyses in ppm were: 14.8, 15.12, 15.31, 14.95 and 15.03. Classify the error in the analysis described above for the determination of potassium in the standard water sample as determinate or random. Please help me
A determinate error can be further categorized into two: constant determinate error and proportional determinate error.
Constant determinate error (ecd) gives the same amount of error independent of the concentration of the substance being analyzed, whereas proportional determinate error (epd) depends directly on the concentration of the substance being analyzed (i.e., epd = K C), where K is a constant and C is the concentration of the analyte.
Thank you 🌸🍃 .
Why slope and intercept are important? Can you show how to calculate slope and intercept?
so the molar absorptivity will still be constant if we change the concentration ?
Yes
Thank you sooooooooooooooo much :]
Thank you!
Sure plzz video on aldehyde Nd ketones as well as solution Nd colligative numericals
Saved me before a final
Can someone epxlain to me why is it that Absorbance and Transmittance don't sum up to 1 please? D:
excellent
Thanks
Superb!
Thank you
THANK YOU
I like ur all vids
make a video on A1%,1cm
Thank u
is the absorbance of water 0?
In some wavelenghts it is, in some it isn't.
NICE
cool tnx
What is this person's account or email ??
Hoyooooo🎉
Ur awesome
krazy chemistry
I noticed your videos are very quiet
God bless you, ( I don't believed in god ) but thx so much. The video really was useful.
Method 2 is short
I love u
the sound is not good I am quite disappointed
Lost me at minute 6.
Thank you