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Postby sharonvivianv » Fri Jun 08, 2018 2:46 pm

How do we know when a salt dissocociates in a reaction? And what exactly does that mean?

Andrew Evans - 1G
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Re: Dissociating

Postby Andrew Evans - 1G » Fri Jun 08, 2018 4:23 pm

Hi Sharon,

From my understanding the mere property of a salt is that it is formed of two ions that dissociate when dissolved in water. So that's it. All salts dissociate when aqueous. And in reality as a reactant, it exists as two separate aqueous ions.
Now how well it dissociates goes back to the ionic properties of the molecule and the strength of its acidic/basic character.
So that goes back to today's lecture as Dr. Lavelle was describing which salts change the pH of the solution. Strong acids dissociate very easily and are stable that way. They don't need to form some bond or interaction with water. Meanwhile weak acids are not that stable being dissociated and tend to then interact with water molecules. These interactions may cause water molecules to break and change the pH of the solution.

-Andrew Evans
Section G

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