The Equilibrium Constant

065 - The Equilibrium Constant In this video Paul Andersen defines the equilibrium constant (K) and explains how it can be calculated in various reversible reactions. The equilibrium constant is a ratio of the concentration of the products to the concentration of the reactants. If the K value is less than one the reaction will move to the left and if the K value is greater than one the reaction will move to the right. Do you speak another language? Help me translate my videos: /> Music Attribution Title: String Theory Artist: Herman Jolly /> All of the images are licensed under creative commons and public domain licensing: "File:Lightning Hits Tree.jpg." Wikipedia, the Free Encyclopedia. Accessed January 2, 2014. />"File:Nitric-Oxide-3D-vdW.png." Wikipedia, the Free Encyclopedia. Accessed January 2, 2014. />"File:Phosgene Poster ww2.jpg." Wikipedia, the Free Encyclopedia. Accessed January 2, 2014. />"Reversible Reactions." PhET. Accessed January 2, 2014. />"Reversible Reactions." PhET. Accessed January 2, 2014.

Alfred Lin
This guy is single-handedly keeping my GPA in equilibrium.
Steffy Martinez
you were there for me when no one else was
Daniel Lam
One thing missing: solid and liquid exceptions.
I wish he would have covered how to calculate the equilibrium constant...
Paris Coroneos
Bo$$man Science more like
Nick D
Thank you Mr. Andersen, your videos are wonderful!
Sylvia Montejano
You're my bio-and-chem-to guy. Keep up the awesome work.
Braedon Van Gorkom
Thank you sir. Simple, effective, insightful and fun. Just what education should be.
Kirthi H
Thank you! K>1,P>R,arrow points to the right indicating a right shift while K<1,P
Shweta Kurwalkar
Thank you soooooo much!!! I love the way you simplify complex concepts and I love the stimulations! I think everyone should watch your videos and benefit from them!!!
Moses Saleh
Very helpful, thank you
Stella Lee
Didn't take chemistry yet, but still understood it. Thanks for the extra knowledge!
Wow thanx for a beautiful lecture. Never knew the meaning of K value. No chemistry book has shown such simplified meaning.
My Birjit Thangjam
Tkkk.....very must sir. Love from Manipur
You're helping me get a degree!
The illustrations are very helpful for me. It would be helpful if they just called it the equilibrium ratio constant. 
Matt Pres
Always enjoy these videos. I am still confused on one thing. At nine minutes during an ICE table the change in H2O is shown as .038 mols. The initial value is zero and the equilibrium value is .138. So why is the change not .138?
Bharti Hooda
Thanx it helps in my AIIMS questions
LeAnn Zuñiga
Mr. Andersen saving my but again. First in high school now in my senior year of college.
Caroline Klevemann
Thank you for helping me through chemistry's difficult concepts. I feel hopeful even when things are hazy in class as I know I can look up the concept on your channel and find clarity! Cheers to you for sharing your knowledge and gift as a teacher!
Kristian Williams
First your videos helped me with AP biology as a senior in high school. Now they're helping me with chemistry in college. I love these.
Infiniterate Shake and Take
Of course that was helpful...thanks! You are the best, Andersen..
Aaron Griffin
How can he explain things so fast but so well?! Keep up the amazing work Mr Andersen you're the best!
Alexandra Saffold
There should be a plus symbol between cC and dD.
Samuel Hodges V
Your videos are so helpful! Thanks so much! Keep up the good work.
Thanks a lot
Bana Aloul
.. thank you!!
Thank you for the videos! Really clarified important concepts!
Thank you Mr. Anderson
Thank you! Very helpful!
Nebi Gebre
It was very helpful sir.
Michael Polidore
Thankyou, it's decent people like you that rid the world of ignorance.
I don’t get why solids aren’t calculated in kc
Lance Love
so my parking space technically floats around
Krystel Shayne Lantano
how did you get the numerical value of the constant?
Much Zinc
is k value given to us on the exam because I​ cannot find it on my periodic table
Eleanor Mystim
Thanks so much, got Chem sac tomorrow and I finally understand the concept :)
why does only temperature affect k, and not pressure, concentation etc?
Idrees Iqbal
thanks mr.Anderson , it was os usefull
Abdulrehman Khan
Thanks Mr.Andersen this is really helpful
Banella G.
really helpful thank you
Alina Bilal
Does it matter if the concentrations are in mM as opposed to M?
Brett Harvey
Wow thanks! That was so helpful!
Hayden Hess
Alvaro Sarria
thank you! it feels like you did it all on one breath though!
u r miss + in the first equation sir
big nibba
Still got a 62 on my test👍
Ray Gaytan
I wish I had your brain!!!! lol
Anthony okpara
am finally getting smething BOZEMAN yuh the best...thkz alot
Middle india VINES Blogg
I am in love with chemistry
Alpha Nguyen
u r the goat & teach sm better than my teacher thank u sir
I watch your videos all the time, and I would just like to thank you for taking the time to post them. You are an excellent teacher, easy to follow and understand. Once again thank you so much!
Gabriel Dayot
What if I'm asked to solve for the Kc and Kp and the given is only the molarities of all the substance given at a certain temperature?
I get this. But what's the proof that _K_ stays the same?
JD Defender
I have an upcoming report for this topic and thnks god that you creaed this video. 😇
Hariram R
What does k represents Is it pressure
Aneesh Vaidya
Thank you soooooooooo much. U r an amazing teacher.
without you ill probably would make fries at mcdonalds. thanks :D
ginger love
is it the same if it ask you to writ an equation for equilibrium constant for forward reaction
Michael McFarlane
thank you so much!!! you are a great teacher!!!!
Ahmed 0
mr anderson can you do more practiced questions and examples please???
aland awat
thank you so much but i have a question! we dont write the liquids and solids in the equation becuz it doesnt affect the concentration but what about aqueous substances? do we include them in the equation? does it affect the concentration
aland awat
thank you so much but i have a question! we dont write the liquids and solids in the equation becuz it doesnt affect the concentration but what about aqueous substances? do we include them in the equation? does it affect the concentration
Adam S
Very helpful. Great job, and thank you!
Gabriel Badea
And phosgene is made by simply let them sit togheter or ignite the mixture?
Sebastian Lacki
Still makes no sense to me. How are the products/reactants converted into numbers? Why number of moles are raised to the power. WTF...
this is actually easy, not hard like we get told at class...
Technical Saurav
ThankU Very much i got it!
sukit virathana
you just practically save my life
God bless ya buddy!
Tony Phan
how do you know the concentration of the substances that youre putting into the K value equation ? is this information usually given ? (high school chemistry btw)
Añuli Okoye-Oyibo
So helpful, thanks!
mr robert
why is it a product and not a sum?
Asif Hussain
Daym every problem I have in chem and physics this guy has already done it
I already knew how to solve it,but the question that was annoying me was that what is k constant and what does its value represent,thanks very much sir,definitely subscribing👍👍👍👍
Jasandip Rana
You rock man!!
Mark Landau
i've been watching your videos since my first intro. chem class a 1.5 years ago. i'm in chem 2 now and you are still doing god's work (i'm atheist btw). can't thank you enough for this invaluable resource, sir
1080p official
Very very helpful thanks... And very easy language....
where did 4.57 x 10^9 come from?
Marvin Abuli
can you do a video on how to find the equilibrium constant in electrolysis
this was just beautiful!!!
Fantastically explained!
Micah Bendicion
4:03 You said "standard temperature and pressure", but then the box said 25 degrees Celsius, which is room temperature. Which did you intend?
Roy C
Wish they had Youtube videos when I was in college taking chemistry.
Thank you it is great the way you present things, but you talk way too fast, slow down brother, pleeease!
Ryan Hernandez
That's some good shet Mr. Andersen bless up
This was so helpful!! Thank you so much :)
Jeff M
You sir are a gentleman and a scholar
That was superhelpful :) Thanks!
Bryson Rhodes
you are super helpful man bless you and all the generations that come behind you!
Mark Sze Chai Chan
Thank you so much!
Michael Schulz
Saving me from failing
What if there are solids or liquid in products and reactants . Do I have to put their concentrations in the equation ?
Patricia Herr
This is helpful, thank you!
Yonas Meshesha
that was helpful
Brandon Andres
How do you get those K values
Joseph Yi
How does temperature affect the equilibrium constant?
Asia Ma
Thank you very much for this helpful video!
All Courses in Somali
Thank you very much. You say if Kc is greater than 1, it moves from reactants to the products side. And if the Kc is less than 1, it moves products to reactants. My question is when can we have the equilibrium mixture for an appreciable concentration of both reactants and products ?
abdul bhat
Damn this sure was helpful thanks brother