strong acid

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katherinemurk 2B
Posts: 68
Joined: Wed Nov 15, 2017 3:02 am

strong acid

Postby katherinemurk 2B » Fri Dec 07, 2018 10:03 pm

I am still confused on how to tell if an acid is strong or not. Does electronegativity play a role in acid strength??

Daniel Bowen 3I
Posts: 32
Joined: Fri Sep 28, 2018 12:24 am

Re: strong acid

Postby Daniel Bowen 3I » Fri Dec 07, 2018 10:08 pm

An acid is stronger when it has an easier ability to dissociate its electrons. HI is a strong acid because it has a large ionic radius therefore it can lose electrons from its valence shell easier, making it a strong acid

Nicholas Carpo 1L
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

Re: strong acid

Postby Nicholas Carpo 1L » Fri Dec 07, 2018 10:12 pm

For determining relative acid strength (ie comparing which acid is stronger), electronegativity can help you determine which acid is stronger. The general guideline is that when looking at the conjugate bases of two acids, the molecule that has more electronegative atoms is the result of a stronger acid.

For example, HOI vs HOCl

HOCl is a stronger acid since the more electronegative Cl (in comparison to I) will draw some negative Formal Charge of the O after donating the H.

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