Liquids

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##### Stephanie C.

University of Central Florida

##### Allea C.

University of Maryland - University College

##### Morgan S.

University of Kentucky

### Video Transcript

Okay, So if we're gonna talk about buffer solutions, we should just do a very quick reminder of, um our review of congregate acid base pairs. So the equation I have written at the top here in black shows the association of a weak acid in water. So if we're looking at this equation, we have the acid represent and just a general formas h A. And then it's con ticket base. Here is a minus. So the whole purpose of a buffer solution is to have the two components in here. So both the weak acid and it's kinda get base so that upon the addition of ah strong or, um, acid or base, we'll have these two components that could essentially absorb the pro pounds. It added. The hydroxide ions were being added, and this allows us to maintain ah, study pH. So if we want to look at the example of conjugated acid base pair that would make up a buffer solution, we should look at a good example written and blue here. So I have written here acetic acid, which is a good example of ah, weak base, and we're just going to identify the congregate base of this acid to come up with our pairs for the buffer solution. So we know that in solution, this ass is going after the Proton donor and that is conjugated based. We'll just being minus. It's acidic pro time, which is this hydrogen? It's written up the front here, so it's congregate base will be see to H three 02 minus. So in this case, we would say that a CD kassid and theosophy I on its con ticket base would be a good pair to make up a buffer solution. But what's typically used in practice is what you call the salt of the conjugal base. So this is, ah, negatively charged, and I on you would usually use something that beat could be using it solid form that stabilize with a cattle and the axes, a counter, and so something like maybe the sodium ion to any a plus. And then we have the asked a I on Mississippi sodium acetate. So then are two components of

KS

#### Topics

Liquids

##### Stephanie C.

University of Central Florida

##### Allea C.

University of Maryland - University College

##### Morgan S.

University of Kentucky