- published: 13 Jun 2014
- views: 23754
A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small or moderate amount of strong acid or base is added to it and thus it is used to prevent changes in the pH of a solution. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. Many life forms thrive only in a relatively small pH range so they utilize a buffer solution to maintain a constant pH. In nature, the bicarbonate buffering system is used to regulate the pH of blood.
Buffer solutions achieve their resistance to pH change because of the presence of an equilibrium between the acid HA and its conjugate base A−.
When some strong acid is added to an equilibrium mixture of the weak acid and its conjugate base, the equilibrium is shifted to the left, in accordance with Le Chatelier's principle. Because of this, the hydrogen ion concentration increases by less than the amount expected for the quantity of strong acid added. Similarly, if strong alkali is added to the mixture the hydrogen ion concentration decreases by less than the amount expected for the quantity of alkali added. The effect is illustrated by the simulated titration of a weak acid with pKa = 4.7. The relative concentration of undissociated acid is shown in blue and of its conjugate base in red. The pH changes relatively slowly in the buffer region, pH = pKa ± 1, centered at pH = 4.7 where [HA] = [A−]. The hydrogen ion concentration decreases by less than the amount expected because most of the added hydroxide ion is consumed in the reaction
What are buffers? How are they made? How do they work?
Example of calculating the pH of solution that is 1.00 M acetic acid and 1.00 M sodium acetate using ICE table. Another example of calculating pH of a solution that is 0.15 M ammonia and 0.35 M ammonium nitrate. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/buffers-and-hendersen-hasselbalch?utm_source=YT&utm;_medium=Desc&utm;_campaign=chemistry Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/chem31-buffers?utm_source=YT&utm;_medium=Desc&utm;_campaign=chemistry Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year h...
Topics : Buffer Solution, Acidic and Basic Buffer Solution, Addition of Acid and Base to Buffer Solution Physics, class XI, Unit: Physical Chemistry, Strength of acid and base Get Full Course To Study Offline Through our website: http://www.m-learning.in Call Us at : (+91)9826023696, (+91) 0731-2497432 Mail us at :info@m-learning.in Amazon: http://www.amazon.in/s/ref=lp_5490084031_nr_p_6_3?fst=as%3Aoff&rh;=n%3A976451031%2Cn%3A%21976452031%2Cn%3A5490084031%2Cp_6%3AA1EOND4VIENEBN&bbn;=5490084031&ie;=UTF8&qid;=1434442994&rnid;=1318474031 FlipKart: http://www.flipkart.com/computers/software/educational-media/pr?p%5B%5D=facets.brand%255B%255D%3DM%2BLearning&sid;=6bo%2C5hp%2Cvxa&ref;=78975f83-7d57-49f5-8cd3-452e26ba85bc Snapdeal: http://www.snapdeal.com/brand/m-learning?pageType=brandStore For...
Getting an intuitive understanding of buffers using le Chatelier's principle. Derivation of the Henderson-Hasselbalch equation. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/buffer-solution-calculations?utm_source=YT&utm;_medium=Desc&utm;_campaign=chemistry Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/common-ion-effect?utm_source=YT&utm;_medium=Desc&utm;_campaign=chemistry Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra ...
069 - pH and Buffers In this video Paul Andersen explains how buffer solutions maintain pH in a solution. A buffer solution is made up of a weak acid and its conjugate base. As strong acids or bases are added the pH remains stable. A good buffer solution has a pKa value equivalent to the pH and equal amounts of the weak acid and the conjugate base. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: →AzaToth. Myoglobin 3D Structure, February 5, 2008. self made based on PDB entry. http://commons.wikimedia.org/wiki/File:Myoglobin.png. File:...
You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. In this episode, Hank talks about how nutty our world is via Buffers! He defines buffers and their compositions, talks about carbonate buffering systems in nature, acid rain, pH of buffers, and titration. Plus, a really cool experiment using indicators to showcase just how awesome buffers are. ***** AND NOW, A SUBBABLE MESSAGE! ***** "Olena, you Spanish-speaking Ukrainian, will you marry me?" -Emannuel Martinez -- Table of Contents Nature is Nutty 0:00 Carbonate Buffering and Acid Rain 0:35 Definition of Buffers 1:47 Composition of Buf...
IIT JEE Main and Advanced Chemistry Video Lectures and Study Material developed by highly experienced and dedicated faculty team of Rao IIT Academy. Visit http://www.raoiit.com or email studentcare@raoiit.com for any query or doubt related to your IIT JEE Preparation. Want to be the Topper ??? Learn Buffer Solution from Rao IIT Academy. Prepare for your Boards and New IIT-JEE Pattern - JEE Main and JEE Advanced / MH-CET / BITSAT / VIT / SRM / Manipal and other Competitive Exams with Rao IIT Academy. -----------------Connect with us.... Subscribe to Rao IIT Academy YouTube channel - http://www.youtube.com/RaoIITAcademy Like us on Facebook - https://www.facebook.com/Raoiit Follow us on Twitter - https://twitter.com/rao_iit +1 on Google Plus - https://plus.google.com/+Raoiit Call us on : +91...
Add some acid. Add some conjugate base. What's the pH? This is the old-school way. You can also use the Henderson-Hasselbalch Equation. In this example I use 0.2 M HF and 0.1 M NaF Check me out: http://www.chemistnate.com
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/acid-base-equilibria/v/strong-acids-and-strong-bases?utm_source=YT&utm;_medium=Desc&utm;_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/acid-base-equilibria/v/autoionization-of-water?utm_source=YT&utm;_medium=Desc&utm;_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calcul...
Remember those pesky iceboxes? Weak acids and bases establish equilibria, so we have to do iceboxes to figure out things about them. But don't worry, buffers are neat. Subscribe: http://bit.ly/ProfDaveSubscribe ProfessorDaveExplains@gmail.com http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry - Online Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry - Online Tutorials: http://bit.ly/ProfDaveOrgChem Science for Common Folk - Online Tutorials: http://bit.ly/ProfDaveScience4CommonFolk
Rozway Digital pH Meter + 6x FREE pH Buffer Powder I purchased this pH tester to see the pH of the filtered water dispenser that I have at home versus our tap water and bottled water. I didn't know much about pH levels in the past but I am researching and learning about it now and how it affects your body. All of the water I tested was within normal levels. The unit was easy to calibrate with the buffer powders that are provided along with the kit. The readout has a green back light and the digits are large and easy to read. It comes with pre-installed batteries so it's ready to use right out of the box as soon as you calibrate it using the 6.86 buffer powder. https://www.amazon.com/dp/B01GN9E1QA #hydroponics
The Early History of Acid—Base Concepts Acid–Base Theories—Not All Are Created Equal, Acid–Base Equilibria in Water, The pH Scale, pH at Elevated Temperatures: Blood pH, Weak Acids and Bases—What Is the pH?, Salts of Weak Acids and Bases—They Aren’t Neutral, Buffers—Keeping the pH Constant (or Nearly So), Polyprotic Acids and Their Salts, Ladder Diagrams, Fractions of Dissociating Species at a Given pH: α Values—How Much of Each Species?, Salts of Polyprotic Acids—Acid, Base, or Both?, Physiological Buffers—They Keep You Alive, Buffers for Biological and Clinical Measurements, Diverse Ion Effect on Acids and Bases: cKa and cKb—Salts Change the pH, log C—pH Diagrams, Exact pH Calculators, Acid–Base Titrations Strong Acid versus Strong Base—The Easy Titratio...
This video lecture from Chemical Equilibrium (F.Sc. Chemistry Book 1) covers the derivation of the Henderson equation for acidic and basic buffers which tells us how to find the pH of any buffer solution. Examples are also included. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.
This video lecture from Chemical Equilibrium (F.Sc. Chemistry Book 1) covers the concept of the Buffer capacity, its capability to resist the change in the pH and a calculation for a case study when base was added into a buffer solution. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.
This video lecture from Chemical Equilibrium (F.Sc. Chemistry Book 1) covers the concept of buffer solutions, the two ways of making acidic and basic buffers, why do we need buffers and the chemistry of buffers solution, how the resist the change in pH. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.
This is video of topic buffer solution from ionic equilibrium chapter and this can help you in understand and make the concepts clear from that topic for IIT jee and other competitive exams For better preparation like ,share and subscribe my channel I will be back with more videos of other chapters of PCM.
If You Want To download whole Electricity and Magnetism package, then go to this link: http://reliabledownloads.org/file/05988960 If You Want To download whole Classical Mechanics package, then go to this link: http://reliabledownloads.org/file/05988959 This Chapter Is Equilibrium Of Chemistry. This Whole Lectures are for IIT-AIPMT-aspirants And CBSE. If U Want Whole Aakash iTutor Package,Then email at-yoyokuli23@gmail.com And Dont Forget To Subscribe.
اسم المساق: كيمياء تحليلية اسم المحاضر: أ.د. منذر عبد اللطيف مشرف الموقع : أ. خالد محمد الأدغم الكلية: العلوم القسم: الكيمياء وصف المساق : يدرس المساق المفاهيم الأساسية في الكيمياء التحليلية، والمفاهيم العامة للاتزان الكيميائي والذي يشمل الأحماض والقواعد، أسس التحليل الوزني والحجمي ومعايرات الأحماض والقواعد ومعايرات الترسيب، ومعايرات المعقدات، ومعايرات الأكسدة والاختزال، وطرق التحليل المعتمدة على الخواص الكهربائية. مركز التميز والتعليم الإلكتروني: http://lectures.iugaza.edu.ps/ http://elearning.iugaza.edu.ps/ قائمة محاضرات المساق: https://www.youtube.com/playlist?list=PL9fwy3NUQKwbICh15S1cAUCJm1SxVhq19 الجامعة الإسلامية غزة: http://www.iugaza.edu.ps/ar قناة مركز التميز والتعليم الإلكتروني بالجامعة الإسلامية - غزة على YouTube : http://www.youtube.com/iugaza1
Learn Chemistry with Topper of Chemistry in JEE. For detail visit www.atozchemistry.com Ioinic Equilibrium deals with acid base equilibrium. it also deals with salt hydrolysis, buffer solution & solubility euilibrium.
This video covers the buffers section of the Acids and Bases topic from the Unit 4 portion of the A2 spec.
Go to my Facebook page https://www.facebook.com/HowtopassIBchemistry/ and my website http://www.SolutionsInChemistry.com/
This is the third of three videos on buffers. The first video examined the qualitative aspects and the second developed a strategy (flow chart) for dealing with the buffer questions in this video. Relatively short in length, but it will skill you up to deal with even the most difficult examination questions. Try them yourself before looking at my solutions.
UCI Chem 1C General Chemistry (Spring 2013) Lec 10. General Chemistry -- Buffered Solutions (Buffers) -- Part 1 View the complete course: http://ocw.uci.edu/courses/chem_1c_general_chemistry.html Instructor: Ramesh D. Arasasingham, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.edu/info. More courses at http://ocw.uci.edu Description: UCI Chem 1C is the third and final quarter of General Chemistry series and covers the following topics: equilibria, aqueous acid-base equilibria, solubility equilibria, oxidation reduction reactions, electrochemistry; kinetics; special topics. General Chemistry (Chem 1C) is part of OpenChem: http://ocw.uci.edu/collections/open_chemistry.html This video is part of a 26-lecture undergraduate-level course titled "General Chemistry" tau...
A tutorial on buffer solutions and the common ion effect.