Acid-Base Equilibria and Buffer Solutions

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.

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[josearchuleta]

I'm not sure if you still read comments on your old videos, but you are saving many students out there. Not just the high school students taking AP Chem either. I am a P1 Student in Pharmacy School having to remember things I have learned so long ago. Thank you for simplifying, I'm not sure why graduate professors have to make things so confusing for no reason!

[supermagnificentguysmg]

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[MissLaraPasternak]

First of all, like everyone else here, I want to express my immense gratitude for your videos. It took me a decade after graduating from college to muster the courage to plan to apply to veterinary school (a lifelong dream of mine), partially because I was afraid I wouldn't be able to do well enough in my prerequisite classes. Due to Covid I have had to take most of my classes online which essentially means I feel like I've been teaching myself for the last year, and your videos have been a true godsend. It's because of you that I've been able to get through my classes and feel like I can actually get into grad school!
Now that I got my cheesy message of gratitude out of the way, I have a question about this video: when calculating the percent ionization, why did your example equal 3.7*10^-3 instead of 3.5*10^-5? Thank you, hope you're having a great weekend!

[yanasheva]

Professor Dave, I cannot find the right words to describe how much you make my life easier! This 5min video 100% ionized all my chemistry related problems, after my fancy book made this stuff only more complicated for me. Thank you.

[sarahlataille]

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[trsolanki]

Hello Professor

So glad to see your explanation in very simplest term...I just hoped to get your videos when I was in 12 Science...!!!

Anyways...nice work and please keep doing same to give benefits to others...!!!

[Fher]

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[jwilson]

Thanks prof, doing HL IB chem and just started acid-base. Love your videos keep it up :)

[IloveNateReuss]

Thankyou for saving my life and my future.

[Minespidur]

cramming for the ap exam tomorrow! thanks so much!

[shenghuozhiyisi]

Please, present a video explaining the isoelectric point. You are a great teacher!

[nyashadzashegumboguru]

Thank you Professor, videos are short, informative making them not tiresome to watch. Most of all explanation is very clear

[MinaMonTea]

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[imosdefinite]

would have been nice to explain how you moved around the pH = -log[H3O] equation to get [H3O] = 10^-ph

[kutlwano_lesele]

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[josemanuelquevedovargas]

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[studycircle]

Hey Proffesor you really explain in a spectacular way

[thesagya]

How did you get the ratio of (0.78/0.22) in the comprehension part? Thank you in advance!

[anishmathewjose]

Thank you for this Prof. Dave, you are the best chemistry teacher i have seen in my entire

[pboyzzadventures]

When You add a strong base or acid to water it will completely dissociate. When weak acid and bases only partially dissociate, but will get to equilibrium. A buffer is a solution that resists changes in pH when acid or base is added by its conjugate base. Buffer solutions can be prepared with the Henderson-hasselbalch equation. In order to make a good buffer the pka must equal the pH.