- 638
- 9 122 004
FranklyChemistry
United Kingdom
Registrace 29. 08. 2007
A Chemistry graduate, I taught in the same grammar school for over 38 years.
I also worked as a Chair of Examiners for Post 16 Chemistry.
My students hail from Hong Kong and Singapore, to Qatar and Kuwait, to Mauritius, to Norway, to New York and back to the UK.
It's been a thrill, on Zoom, working with so many wonderful children like you. I've learnt a great deal - different cultures, different attitudes to work and different expectations.
Frank (for FranklyChemistry).
Let me know you're interested: fgs55@icloud.com.
I also worked as a Chair of Examiners for Post 16 Chemistry.
My students hail from Hong Kong and Singapore, to Qatar and Kuwait, to Mauritius, to Norway, to New York and back to the UK.
It's been a thrill, on Zoom, working with so many wonderful children like you. I've learnt a great deal - different cultures, different attitudes to work and different expectations.
Frank (for FranklyChemistry).
Let me know you're interested: fgs55@icloud.com.
Kinetics 2: Determining the Order of Reaction - Tricky examples
Here I look at 3 fairly tricky examples of how the order of the reaction for each of the reactants is determined, allowing the rate equation to be constructed. In an accompanying video "Kinetics 1" I show an example of how to rearrange the rate equation to determine the rate constant (k).
zhlédnutí: 17 985
Video
Kinetics 1: Finding the Order, Rate Equation & Rate Constant
zhlédnutí 14KPřed 6 lety
Here I look at 3 examples of how the rate equation can be obtained from experimental runs. The order of the reaction for each of the reactants is determined, allowing the rate equation to be constructed. In the third example I rearrange the rate equation to make the rate constant (k) the subject of the equation. I then work out its value and units. In the next video "Kinetics 2" I look at 3 fur...
GCE Chemistry Calculation 3.
zhlédnutí 1,7KPřed 6 lety
This is a redox titration calculation involving hydrogen peroxide; potassium iodide and sodium thiosulfate with starch. It is one in a small set looking at GCE chemistry calculations that are quite difficult and/or strange.
GCE Chemistry Calculation 2.
zhlédnutí 712Před 6 lety
A short series of videos looking at quite difficult and/or strange chemistry calculations for GCE.
GCE Chemistry Calculation 1
zhlédnutí 921Před 6 lety
One in a series of videos looking at selected GCE chemistry calculations that are difficult and/or unusual.
Amino Acids 12. Protein Hydrolysis.
zhlédnutí 22KPřed 8 lety
This video uses animation to illustrate and explain during the hydrolysis of a protein. Hydrolysis means to break a molecule apart using the elements of water. It can be done by either refluxing the protein with 6 Molar Hydrochloric acid for 24 hours or leaving the protein mixed with protease enzymes at 37 Celsius ffor several hours. Protein hydrolysis is relatively difficult because they have ...
Amino Acids 11. Enzyme lock and key mechanism and influence of temperature and pH on their activity.
zhlédnutí 2,1KPřed 8 lety
This video looks at the lock and key mechanism of enzymes and at the influences of temperature and pH on their activity. It uses an animation to illustrate and explain the lock and key mechanism. It then goes on to consider and explain how low and high temperatures impacts on the enzyme's activity. Finally, it shows that different enzymes work best over different pH ranges. Pepsin, amylase and ...
Amino Acids 10. Comparing Fibrous and Globular Proteins.
zhlédnutí 50KPřed 8 lety
Must see: My new website at ww.acechemistry.co.uk. This video compares the structures of fibrous and globular proteins. It uses animations to show that while both have a primary and secondary structure, only globular proteins have tertiary (and sometimes quarternary structure as well). It shows how the polar R groups are directed outward from spherical molecules in globular proteins, explaining...
Amino Acids 9. The tertiary structure of a Protein.
zhlédnutí 10KPřed 8 lety
This video provides a quick overview of the 4 types of bond that hold a polypeptide molecule in its folded tertiary structure. It uses animation to show van der Waals forces form between adjacent valine molecules; electrostatic attractions form between lysine and aspartic acid; hydrogen bonds forming between the O-H of aspartic acid and O-H of serine; and a disulphide bond form between cysteine...
Amino Acids 8. The beta-pleated sheets secondary structure of Proteins
zhlédnutí 30KPřed 8 lety
Must see: My new website at ww.acechemistry.co.uk. This video looks in detail at the beta-pleated secondary structure of proteins. It uses animation to show intramolecular hydrogen bonds forming between the N-H of one amino acid and the C=O of another further along the chain. These bonds explain why the polypeptide should take on a twisted structure and maintain it. This is one in a series of v...
Amino Acids 7. The alpha helix secondary structure of Proteins
zhlédnutí 38KPřed 8 lety
Must see: My new website at ww.acechemistry.co.uk. This video looks in detail at the alpha helix secondary structure of proteins. It uses animation to show intramolecular hydrogen bonds forming between the N-H of one amino acid and the C=O of another further along the chain. These bonds explain why the polypeptide should take on a twisted structure and maintain it. This is one in a series of vi...
Amino Acids 6. A summary of the Secondary Structure of Proteins
zhlédnutí 9KPřed 8 lety
This video summarises the two main types of secondary structure in a protein, namely, beta-pleated sheets and alpha helix. There are separate videos here that look at these types of secondary structure in details. You will see how intramolecular hydrogen bonds result in the twisting that occurs. These form between the N-H of one amino acid and the C=O of another further along the chain. This is...
Amino Acids 5. Formation of a Polypeptide.
zhlédnutí 12KPřed 8 lety
This video looks at the formation of a polypeptide in a condensation reaction. It uses animation to show amino acids reacting together to form a long chain polymer molecule. This is one in a series of videos looking at the chemistry of amino acids and proteins. Other in the series look at: the structures of amino acids; the zwitterion and its amphoteric properties; the reactions of the amino ac...
Amino Acids 4. Formation of a Dipeptide.
zhlédnutí 42KPřed 8 lety
Must see: My new website at ww.acechemistry.co.uk. This video looks at the formation of a dipeptide in a condensation reaction. It shows the two possible dipeptides that can be formed from glycine and alanine. This is one in a series of videos looking at the chemistry of amino acids and proteins. Other in the series look at: the structures of amino acids; the zwitterion and its amphoteric prope...
Amino Acids 3. Reactions with sodium hydroxide, sodium carbonate & copper (II) sulfate solution.
zhlédnutí 19KPřed 8 lety
Amino Acids 3. Reactions with sodium hydroxide, sodium carbonate & copper (II) sulfate solution.
Amino Acids 2. The Zwitterion used to explain the physical and chemical properties of amino acids.
zhlédnutí 4,1KPřed 8 lety
Amino Acids 2. The Zwitterion used to explain the physical and chemical properties of amino acids.
Amino Acids 1. Structures of the 20 Amino Acids.
zhlédnutí 23KPřed 8 lety
Amino Acids 1. Structures of the 20 Amino Acids.
Simply Mechanisms 13b. Role of radicals in ozone formation and depletion in the stratosphere
zhlédnutí 19KPřed 8 lety
Simply Mechanisms 13b. Role of radicals in ozone formation and depletion in the stratosphere
Simply Mechanisms 13a. Free radical substitution (methane and chlorine in uv light)
zhlédnutí 34KPřed 8 lety
Simply Mechanisms 13a. Free radical substitution (methane and chlorine in uv light)
Simply Mechanisms 3c. Ethanol from the catalysed hydration of ethene
zhlédnutí 19KPřed 8 lety
Simply Mechanisms 3c. Ethanol from the catalysed hydration of ethene
Simply Mechanisms 3b. Electrophilic Addition 4. Propene & c. Sulfuric Acid - Markovnikov's Rule
zhlédnutí 4,9KPřed 8 lety
Simply Mechanisms 3b. Electrophilic Addition 4. Propene & c. Sulfuric Acid - Markovnikov's Rule
Simply Mechanisms 12b. Elimination reaction 2 (2-bromobutane & ethanolic KOH)
zhlédnutí 30KPřed 8 lety
Simply Mechanisms 12b. Elimination reaction 2 (2-bromobutane & ethanolic KOH)
Simply Mechanisms 12a. Elimination reaction 1 (bromoethane & ethanolic KOH)
zhlédnutí 12KPřed 8 lety
Simply Mechanisms 12a. Elimination reaction 1 (bromoethane & ethanolic KOH)
Simply Mechanisms 4c: SN2. Reaction of bromoethane with NH3
zhlédnutí 14KPřed 8 lety
Simply Mechanisms 4c: SN2. Reaction of bromoethane with NH3
Simply Mechanisms 4b: SN2. Reaction of bromoethane with KCN
zhlédnutí 17KPřed 8 lety
Simply Mechanisms 4b: SN2. Reaction of bromoethane with KCN
Simply Mechanisms 7h. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ethylamine).
zhlédnutí 3,3KPřed 8 lety
Simply Mechanisms 7h. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ethylamine).
Simply Mechanisms 7g. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ammonia).
zhlédnutí 3,3KPřed 8 lety
Simply Mechanisms 7g. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ammonia).
Simply Mechanisms 7f. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ethanol).
zhlédnutí 3,6KPřed 8 lety
Simply Mechanisms 7f. Nucleophilic Addition Elimination (Ethanoic Anhydride & Ethanol).
Simply Mechanisms 7e. Nucleophilic Addition Elimination (Ethanoic Anhydride & Water).
zhlédnutí 4,8KPřed 8 lety
Simply Mechanisms 7e. Nucleophilic Addition Elimination (Ethanoic Anhydride & Water).
Simply Mechanisms 7d. Nucleophilic Addition Elimination (Ethanoyl Chloride & Ethylamine).
zhlédnutí 4,4KPřed 8 lety
Simply Mechanisms 7d. Nucleophilic Addition Elimination (Ethanoyl Chloride & Ethylamine).
Can I use sulphuric acid
I went to 100 vidoes, but this saved me.
Malaya
13 years later, watching this before my ib finals !, gg brotha
it is exactly what i was looking for thank u homies
why doesn't zinc reduced chromium(III) to chromium metal? Isn't the Ecell value positive too? Why is the reduction of chromium(III) to chromium(II) by zinc favoured instead?
Thanks for solving my doubt
very well explained 👏
Why not 1- bromo 4 methyl pentane
Nice colors!
GREAT VIDEO VERY ENJOYABLE EXPERIENCE MATE
change your font gng
Good video
chemistry is so fun
When I was watching, I realized something... And that is that they were coming close to each other just like they are a couple... 🤣😂😅😅 But bro don't take it serious or on heart... It was ALSO very useful for my H.W 🙂🙂😀
thanks 🔥🔥
Thank you
Mmmmn😊
I find it difficult to understand that the 4 connected groups not just move around and reshuffle all the time. If they were this flexible then both mirrored versions would be the same.
I love you, kind soul I wish nothing but the rest of you’re life full of goodluck, prosperity and love
great explanation
Great job bro 😊. Very helpful 👍
Great explanation
Thank you . This helped me . Cool calm collected . Explained with few words and a clear explanation 👌. Please do more exercises
czcams.com/video/WGqyDoR-fyU/video.htmlsi=FqYaq1MCutRVn6Cm
but their chargers are not equal
Which colour is the residue?
A white solid (MgO) and a pink sold (Cu) forms
Hi, please what is reflux
how about reacting with KOH???
3:06 assume you mean cobalt...?
Hello, please I don't understand why the NH3 is positive
👍
Thanks sir
there is no silicon here otherwise it is good also the video is a bit too fast also plz add silicon after aluminum and sulfur after phosphorus
have you a technology provider? for a plant ethanol in natural gas 11.5% -170 MMSCFD
What do you mean CARRY the charge? They ARE the charge.
They have charge(electrons have negative charge)
If it's propanoic anhydride how will the reaction be carried then
I want to eat
Can i get the excel file
Wtf. I was expecting chapter explanation. All in one qr code brung me here
czcams.com/video/H4Vz1_D3UL0/video.html
Thank you so much!!
thx that helped a lot i know mark rule now
2:56 its actually 1 electron from the cloud that is removed.
You just made some acetyl chloride… Is it really that simple and quick to synthesise ?
Thank you
Ooo o
🇧🇩🇧🇩🇧🇩🇧🇩thank sir