Why do acids and bases react?

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DTingey_1C
Posts: 55
Joined: Fri Aug 30, 2019 12:16 am

Why do acids and bases react?

Postby DTingey_1C » Mon Nov 25, 2019 1:20 pm

In an acid-base reaction, such as:

HBr = K+(OH)- --> KBr + H2O

What is forcing the H atom in the HBr to switch with the K atom in the K+(OH)-? Is switch the wrong word to use? Is there a better way to understand this reaction conceptually? Thanks.

LNgo 1G
Posts: 100
Joined: Sat Aug 24, 2019 12:16 am

Re: Why do acids and bases react?

Postby LNgo 1G » Mon Nov 25, 2019 1:34 pm

I believe this would be considered a substitution reaction, so the ions do essentially "switch". The bonds in the molecules break in water due to hydrogen bonding and are reformed in more stable structures.

Qiu Ya Wu 4I
Posts: 107
Joined: Fri Sep 20, 2019 12:17 am

Re: Why do acids and bases react?

Postby Qiu Ya Wu 4I » Mon Nov 25, 2019 1:36 pm

Assuming that HBr + K+(OH)- --> KBr + H2O is your intended reaction, this reaction is an example of a neutralization reaction, which you could read more about in Fundamentals J.3. The H+ ion dissociates with the Br in the presence of a metal hydroxide (KOH-) since HBr is a strong acid and KOH- is a base. When the two combine, they produce a neutral salt (KBr) and water.

Hannah Romano 4D
Posts: 55
Joined: Sat Aug 24, 2019 12:18 am

Re: Why do acids and bases react?

Postby Hannah Romano 4D » Mon Nov 25, 2019 2:17 pm

Because KOH and HBr are soluble, they will dissociate to K+, OH-, H+. and Br-. Then the ions will react with one another to form the products.


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