## % dissociation

Jasleen Kahlon
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Joined: Wed Nov 21, 2018 12:19 am

### % dissociation

Can someone please explain what % dissociation means and how it is calculated?

Myka G 1l
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### Re: % dissociation

Percent dissociation is the amount of H+ ions produced by an acid in solution divided by the amount of unreacted acid [HA].

Venus_Hagan 2L
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Joined: Fri Aug 02, 2019 12:16 am

### Re: % dissociation

percent dissociation is how much of the acid separated into its conjugate base and a proton compared to the original amount of acid or how much of the base separated into its conjugate acid and OH- compared to the original amount of base. You can calculate it by putting either the concentration of the conj acid/base over the original concentration of the acid/base

Venus_Hagan 2L
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

### Re: % dissociation

Venus_Hagan 2L wrote:percent dissociation is how much of the acid separated into its conjugate base and a proton compared to the original amount of acid or how much of the base separated into its conjugate acid and OH- compared to the original amount of base. You can calculate it by putting either the concentration of the conj acid/base over the original concentration of the acid/base

sorry correction not over the original concentration, its over the concentration of unreacted acid/ base

gconcha
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### Re: % dissociation

% disassociation is a measurement of how much an acid has "dissociated" or disconnected into its constituent parts in a solution.

take for example iodic acid
$HIO\underset{3}{ } + H\underset{2}{ }O \rightleftharpoons IO\underset{3}{ }^{-} + H\underset{3}{ }O^{+}$

In the solution of H2O , the iodic acid will naturally come apart (based on its Ka) into its constituent base IO3- and H3O+ .

Once there are cations floating around, they act acidically. But importantly, when an acid breaks into parts, that is it losing association: dissociating.

The way that we calculate % dissociation is by dividing the concentration of H3O+ ions over the initial concentration of the acid (in our case HIO3)