The Rate Constant

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037 - The Rate Constant
In this video Paul Andersen describes the characteristics of the rate constant in chemical reactions. The rate constant is highly variable in reactions and must be determined experimentally. The rate constant is dependent on both temperature and the presence of a catalyst. In a first-order reaction the rate constant and the half-life are both independent of the concentration and inversely proportional.
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7 сен 2024

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Комментарии : 52

@ralphaugustus9596 9 лет назад

Hello, Mr. Andersen. I am Ralph A Augustus, a medical student. Your lectures helped me a lot with Pharmacology. I also followed your videos for studying Chemistry. Thanks a ton.

@MrHuddo 7 лет назад

hahhahaha ^

@Keddm27 10 лет назад

I learned more in these 7 minutes than I did in my 50 minute lecture today. Please monetize your videos, you deserve to be paid.

@blacnova3771 7 лет назад

Which company?

@cyriactalus1865 6 лет назад

BOSE man

@ThomsTravels 5 лет назад

Here in 2018 and hes got 800k subs and is probably making at least $30k a month from youtube. Bet hes glad he stuck with youtube.

@thut6619 7 лет назад

Thank you Mr. Andersen. You are a hero to me because I only feel absorbed when I watched your videos!

@lordvenomous6335 3 года назад

The moment mr smart guy says that the constant isn't constant you know you're in for a good time

@seraij7694 6 лет назад

You have been saving my college GPA these last 2 years

@jiaqihe1369 5 лет назад

Amazing! Hard to believe you shot these videos in 2013. They helped me to deal with the 2019 AP Chemistry exam anyway : )

@ahmedelsaid173 5 лет назад

thats still tmrw

@thatGfromLBC 8 лет назад

Should have been titled half life reactions

@mk9834 8 лет назад

thanks Mr Andersen

@lovelygirl0921 9 лет назад

Thank you Mr. Andersen

@yousefal-jafar8947 7 лет назад

I have a question please . What I understood from the previous video that the rate of reaction in the zero order is constant ( in other words) if we increase the the concentration of the reactants the rate " how fast the reaction will proceed " is not effected thus its independent from the reactants concentration and the given example was ammonia NH3. While also in the previous video , it has been said that the first order reaction will be Dependent on the concentration of the reactions ( it was shown to be inversely relationship ) this can be shown in H2O2 example . However, in this video (37) , So that I found it quite confusing as it is mentioned that it in-dependent. Please provide clarification Many thanks

@n.khaidar8926 5 лет назад

I know this is a little late but maybe it could help someone else struggling with the same question. From what you've said, it seems you'v got the reaction rate and the rate constant mixed up. Reaction rate is how fast the reactants are getting consumed and is presented by: Rate = k [A] + [B] since in a zeroth order reaction the reactants are raised to the 0th power that gives us rate= K. hence the rate in a zeroth order reaction is equal to K, the rate constant, which is independent of the reactant concentration. K in any order reaction is independent of the reactant concentration. The only thing with first order reactions is that the K also has a relationship with the half life of the reactants, as they both are independent of the reactant concentration and have an inverse relationship. hope that helps

@usmanchughtai1751 9 лет назад

Very helpful, I had trouble grasping this material, Thankyou.

@user13947 10 лет назад

Very helpful!! You're an awesome teacher!!

@StationaryPotato 9 лет назад

Thank you so much, I couldn't get it when I tried earlier. Really helped out.

@siabf96 10 лет назад

If the rate of a reaction is affected by temperature, concentration, pressure and surface area, then why does the rate law only have concentration and a constant in its equation?

@TheAceOverKings 9 лет назад

I'm still a student myself, but I'm pretty sure that is why the rate has to be determined experimentally. We would have to have an extremely complicated equation, if such an equation exists, to find a new k value for each reaction taking into account temperature, concentration, pressure and surface area, let alone activation energy and thermodynamic factors. It's simply not practical. Finding it experimentally allows the constant to be calculated via the equation provided with a few trials and only the start and end concentrations.

@StationaryPotato 9 лет назад

+TheAceOverKings Why can I not see the rest of your comment?

@riio15 7 лет назад

it was really helpful, thanks a lot!!

@armankarami8667 10 лет назад

Thank you so much. I really enjoy your videos

@PalakPandey289 Год назад

Thank You so much sir🙏

@hmh6040 4 года назад

Thank you! It is very clear and helpful!

@PorkCh0pExpr3ss 9 лет назад

How is the half life determined? Specially if U238 has a half life of 4.47 billion years how can one determine this?

@Incubus187 7 лет назад

extrapolation from the graph

@user-os1qt9jz1o 6 лет назад

still doesn’t tell me what the RATE constant represents. some up for us buddy. is it how fast the rxn is going?

@amilensouto1069 4 года назад

He said: "It is how fast the reaction is proceeding", so yes

@AD-wg8ik 3 года назад

amilen souto thats the rate, not the rate constant.

@fagk1546 3 года назад

do you have the place / media to ask? i have a problem about constant of rate and activation of energy

@allykahn7519 6 лет назад

Bless your soul

@bunny4173 3 года назад

Thank you bozeman ...love from Pakistan ....

@hichamabououalid5107 7 лет назад

very Nice, thak you

@theresnanceclasses4008 3 года назад

Thank u sir

@jennazhang4927 9 лет назад

thanks!

@likeakittie 10 лет назад

Very helpful! Thank you!

@yajatyadav3348 6 лет назад

O+NO2=NO?? At 2:51, that's the second equation. Also, how is NO+O3=NO2??!

@alexandram6081 8 лет назад

Why the fuck is it called a rate constant if it's not constant. UGH.

@evanwoodske9149 7 лет назад

Alexandra Mangam it is a constant...it changes depending on the reaction, but it's constant for each reaction

@NeirinCedric 7 лет назад

fixed by reaction and temperature

@94Torchwood94 7 лет назад

You lost me at 0.693

@hojo2369 7 лет назад

half life was developed by gabe newell

@Oliwolf78 6 лет назад

Half life 3 confirmed

@lumierebisimwa5255 3 года назад

So This man knows everything 🤔

@scrappydoo69 Год назад

W prof

@luis6412 Год назад

Thanks bozoman

@itsrohen1697 3 года назад

Kevin De Bruyne!

@realdealholyfield9616 5 лет назад

is he speaking English?

@TheHeartOfTheHour1 11 лет назад

Hello, my name is Ben. I am a young graphic designer standing at the age of 15. I was hoping to some day grow my channel, so I would have more of an audience of what I have now. I put a lot of effort into my designs. I was wondering if I could make you a banner for your youtube channel, in trade for a spot in your subbox. I hope to maybe gain a small audience from the spot in your subbox. If you are interested, please message me over youtube! Also, my biology teacher plays your videos nonstop.