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Chemistry university
Приєднався 31 бер 2010
Chemistry lectures in small pieces by Dr. Wilson.
Systematic Treatment of Equilibrium
Here we examine the equilibrium of calcium fluoride dissolving in water. First an ICE table is used to estimate the calcium concentration. Then systematic treatment of equilibrium is used with the Ksp, Ka, Kb, Kw, mass balance, and charge balance equations.
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Відео
Types of Analytical Techniques
Переглядів 1,5 тис.Рік тому
There are two main types of analytical techniques; total analysis and concentration analysis. These broad categories are discussed in this video.
What is Analytical Chemistry?
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Here we explore briefly what analytical chemists do. There will be more videos to follow in this series.
Relative Acidities of Protonated Atoms
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Relative Acidities of Protonated Atoms
Functional Groups Effect on Acidity
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Functional Groups Effect on Acidity
Predicting Proton Transfer Reactions
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Predicting Proton Transfer Reactions
Drawing all Constitutional Isomers part 2
Переглядів 1412 роки тому
Drawing all Constitutional Isomers part 2
Drawing all Constitutional Isomers part 1
Переглядів 5652 роки тому
Drawing all Constitutional Isomers part 1
i love your pen
thank you!
Litterally the best point group identifying video I've ever seen
medieval ahh writing 😭😭😭
In last example why we write iupac name carboxamide??
Since it is just off of a ring it has that special name.
I watched the whole videos in this playlist, That is helpfull , thanks❤❤❤❤❤
I am glad you found them useful.
Neat pen
thank you lots! the way you explained it helped me envision the reason why double bonds have restricted rotation. thanks again!!
You are welcome!
Thank you so much SIR ❤❤
You are welcome.
Your videos are so helpful! thank you so much Professor!
I am glad you enjoy them.
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so zaitsev major goes after the one with the lowest H's and forms the double bond to stabalize the molecule after the leaving group leaves. The strong base deprotonates the H and the h leaves its electrons behind where the double bond is formed and stabalizing the molecule.
I have a question. I've been taught to go from one side of the molecule to the other, but when you did the last example, you started from the functional group, to the end on each end. What is the reasoning? Is it because we've already identified it as an anhydride(carboxylic acid-water) and we are working from inside to outside in abc order? I've only done organic chemistry 1 and it was a while back.
We need a consistent starting point for numbering. Often that is from one side to the other to minimize the numbers. In many functional groups they will be on the end of a chain like carboxylic acids or aldehydes. In the case of anhydrides and esters the functional group will be in the middle so we work from there.
In the 2nd example, the reaction created charges, but why? Shouldn't it neutralize any charges. It isn't energetically favorable
In that case SN1 may be more likely, but SN2 can still happen. NH3 is a good attacker and the leaving group is very stable. This video is more about how to draw a SN2 mechanism, even if it is less likely.
thanks ❤
i like your pen
2x speed moment
wooooow❤❤❤❤❤❤❤❤❤❤
What do you mean by just the spectroscopy
Using vibrational spectroscopy (IR) the sulfur oxygen bond shows it is a double bond.
First one i saw who brought the universal idea of entropy into account. Our teacher just had us memorise the definition. Love it
I read it in a textbook.
God you never mentioned what liquid did you add
I did the extraction with dichloromethane and the recrystalization from acetone. It is also possible to use diethyl ether for the extraction and ethanol for the recrystalization.
😅@@Chemistryuniversity
Question: why doesn't the Br radical attack the double bond(like in anti markovnikov)? Also, cool pen 😮
The radical is resonance stabilized. If the concentration of either HBr or Br2 gets too high, then addition to the double bond will occur.
cool pen 😮😮😮😮😮😮😗
This guy takes his handwriting and penmanship seriously, instant approval from me.
:)
second year chemistry student here, thank you so much!
You are welcome!
abbreviation of acetonitrile is either MeCN or ACN
Great video thanks!
Sweet pen as well! Cheers!
This very simple to understand.
شكرا لك بزااف
No one can explain this well
Because, fundamentally, this isn't Chemistry. The labels "C", "D", etc. refer to different kinds of "Groups". They are mathematical structures that obey similar laws. This is just the application of a branch of Math called Group Theory to atoms and molecules. Group Theory can be used to describe the symmetry of any object, not just molecules. But, ultimately, what you need to know for Chemistry is the different symmetry operations. Flipping across a mirror plane, rotating a molecule, or doing a combination of both. Also, importantly, according to Group Theory there exists an "identity" operation, usually denoted by "e", which doesn't change the molecules orientation at all. Doing different combinations of symmetry operations will be equivalent to doing some other symmetry operation in the Group. For example, flipping an atom across a mirror plane through the middle of the molecule is the same as rotating 180°. Rotating 360° is the same as the identity operation "e", and so on.
love the pen! where did you buy it from?
Here is a link to them www.amazon.com/Handmade-Borosilicate-Signatures-Calligraphy-Decoration/dp/B08C7NVFPX/ref=mp_s_a_1_4?crid=28U64NYTWXHZO&dib=eyJ2IjoiMSJ9.lK9gpQsUjPA9v9H3EMMhNPRBeboK0jg8GLvlpm7CmrUREb5DLsGFgWNwTkKI5EejAesReNsGj_6A-a6mfIz1-461MniU1KjOcy4FRD2pSR3jA3MJTv6dgSLrHE7IcUJJqhVDjeUiUqwKqSHLxLp-yPnUW8s_grRFp07RO6D3M9zjKzmZJJ2rU-KoKLkmwsCIyJ7VbKf3lw5pKb4an9FN6w.1pFguzLdzQNRSbnUV6g46U5GRPze9dH7hvDaC0PCI9U&dib_tag=se&keywords=glass+dip+pen&qid=1728930168&sprefix=glass+dip%2Caps%2C188&sr=8-4
trimyristin plays comical tricks on you
I'm trying to hard to visualize the planes but I'm failing
Great video! I am able to understand.
Could you please demonstrate the mechanism for each reaction?
Will the t-Pentyl alcohol react with HCl acid at -10°C without shaking creating t-Pentyl chloride? Also, how long will it take to react if it does react? It's 10 minutes at room temperature, it's probably longer at -10°C. How about 2-methyl-2-butanol (t-Pentyl alcohol) and bubbling HCl dry gas through it at -10°C? If HCl gas does react with 2-methyl-2-butanol at -10°C, how long will it react? would be good to bubble HCl gas through 50% Ethanol and 50% 2-methyl-2-butanol and Norpropylhexedrine freebase dissolved in it at -10°C and watch a precipitate of Norpropylhexedrine HCl, will it work? I got to do some science! If it doesn't work and creates 2-methyl-2-butyl chloride and Hydrogen oxide (H2O, Water) too fast, then maybe other cosolvents for Dry Ethanol can be used.
From experience I know that lower concentrations of HCl are much slower at conversion than 12 M. I have not tried colder temperatures, but it will be slower. The compound you reference is an inhaled drug with abuse potential. I caution experimenting with it without a proper fume hood. There are other amines that you could try instead if you just want to experiment with making ammonium type salts.
This is they best chem channel I have seen that I can understand what I spend 14weeks learning didn't understand
Thank you, I’m glad the videos are helpful. I made them to teach my class during remote learning, but now I use them for a flipped classroom.
Nice but
You might need to turn your audio (voice volume) up a little.
hi! silly question but what pen is that? 😭
It is a glass dip pen www.amazon.com/Handmade-Borosilicate-Signatures-Calligraphy-Decoration/dp/B08C7NVFPX/ref=mp_s_a_1_3?crid=3TSA88DGQHXXH&dib=eyJ2IjoiMSJ9.2XjLqGlIpGO27GqWd_mlLQd5ev8PGmYG_0Ktujqnr2wImdllWtwnrpx3BDShAr9-4LN7sY5OM1kS_n8h8I1L888RUzT43qAiGXFyey-Q9Vg3NuZwvxF0HWIEnkODImcifyH3iMTjX5HYkckDe4MBEVUzoDVB2pXsBJpejTyhS5p5PDscuOY6NSnhmiHKEOKly52fhx6oadaarz3Ns7RI1A.NoSv9HWdDC23KOLL-SJt6t1GNhD9FGMHfmAYPVqZbJA&dib_tag=se&keywords=glass+dip+pen&qid=1725205072&sprefix=glass+dip%2Caps%2C304&sr=8-3
for the first time in my life I understand stereochem, all thanks to u and ur efforts!
Wow, the video and lecture was absolutely amazing, love form south Africa
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Thank you so much!! It helped a lot❤
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