Salts with Cl

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Ashley Hiti 1K
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Joined: Fri Sep 24, 2021 5:10 am

Salts with Cl

Postby Ashley Hiti 1K » Fri Dec 03, 2021 6:54 pm

Is it safe to assume that salts containing Cl will form HCl as the parent acid?

Alex Yeghikian 1C
Posts: 104
Joined: Fri Sep 24, 2021 6:27 am

Re: Salts with Cl

Postby Alex Yeghikian 1C » Fri Dec 03, 2021 7:19 pm

Cl- is the conjugate base of HCl. Therefore, when HCl is involved in an acid-base reaction, the salt will contain Cl-. However, because it is a strong acid, Cl- will not affect the pH of the solution and won't revert back to HCl.

Nataly Antonova 1B
Posts: 101
Joined: Fri Sep 24, 2021 7:03 am

Re: Salts with Cl

Postby Nataly Antonova 1B » Fri Dec 03, 2021 7:25 pm

If we consider a reaction in an aqueous solution (one containing water) this is true. For example, if Cl- (the base) is put in water, this is the reaction that we would expect:

Joshua Lee 3C
Posts: 103
Joined: Fri Sep 24, 2021 6:49 am

Re: Salts with Cl

Postby Joshua Lee 3C » Fri Dec 03, 2021 9:40 pm

Yes, the Cl- ion is the conjugate base of the HCl acid. Since HCl is a strong acid, the acidity of the salt will be based on the cation. If the cation is the conjugate acid of a strong base, then the salt is neutral. But if the cation is derived from a weak base, then the salt, when dissolved, would make the solution more acidic.

605721741
Posts: 108
Joined: Fri Sep 24, 2021 6:23 am

Re: Salts with Cl

Postby 605721741 » Sat Dec 04, 2021 3:31 pm

Salts with Cl- will disassociate into their respective cation and Cl- in solution.

905767718
Posts: 125
Joined: Fri Sep 24, 2021 7:33 am

Re: Salts with Cl

Postby 905767718 » Sat Dec 04, 2021 3:44 pm

If a salt has Cl, then since it is a strong acid it won't affect the pH and you'll have to write out the equation based on the weak base and its conjugate acid.


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