% dissociation

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

% dissociation

Postby Jasleen Kahlon » Mon Feb 10, 2020 12:00 am

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

Myka G 1l
Posts: 100
Joined: Fri Aug 30, 2019 12:17 am

Re: % dissociation

Postby Myka G 1l » Mon Feb 10, 2020 12:03 am

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

Postby Venus_Hagan 2L » Mon Feb 10, 2020 12:07 am

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
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Re: % dissociation

Postby Venus_Hagan 2L » Mon Feb 10, 2020 12:08 am

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

Postby gconcha » Mon Feb 10, 2020 12:19 am

% 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


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)

Daria Azizad 1K
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Re: % dissociation

Postby Daria Azizad 1K » Mon Feb 10, 2020 12:27 am

Calculate the amount of H+ and divide by orginal amount of acid then multiply by 100


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