Neutral salt

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Lorena Zhang 4E
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Neutral salt

Postby Lorena Zhang 4E » Wed Dec 05, 2018 10:41 pm

So I know that salts that contain conjugate acids of weak bases produce acidic solution, and salts that contain conjugate bases of weak acids produce basic solution. But how do you know when the salt is neutral? For example, KBr is a neutral salt. Is it that if it doesn't fit into any of the category above, then it would be a neural salt?

Emmaraf 1K
Posts: 94
Joined: Sat Oct 20, 2018 12:16 am

Re: Neutral salt

Postby Emmaraf 1K » Thu Dec 06, 2018 12:47 pm

Yes, if the cation is a conjugate acid of a strong base and the anion of the salt is a conjugate acid of a strong acid then the salt will have no effect on pH

Catly Do 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:24 am

Re: Neutral salt

Postby Catly Do 2E » Thu Dec 06, 2018 2:10 pm

Looking at salt as the product of an acid-base reaction, we can determine how the salt would act. For example, a popular neutral salt is table salt, or NaCl.
We know the Na+ ion comes from NaOH. NaOH is a strong base, dissociating fully. Once dissociated, Na+ does not want to turn back into NaOH.
We know that the Cl- ion comes from HCl. HCl is a strong acid, dissociating fully. Once dissociated, Cl- does not want to turn back into HCl.
Both Na+ and Cl- are neutral, which then demonstrates that NaCl is a neutral salt.

605168557
Posts: 65
Joined: Fri Sep 28, 2018 12:18 am

Re: Neutral salt

Postby 605168557 » Sat Dec 08, 2018 6:09 pm

When Ka(cation)=Kb(anion) it is neutral


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