Strong Acids vs Weak Acids

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abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

Strong Acids vs Weak Acids

Postby abbydouglas1K » Fri Dec 07, 2018 12:03 am

How can you tell which is which? I know that string acids apparently pronate in water but how can you tell by just looking at them ?

KatelinTanjuaquio 1L
Posts: 69
Joined: Fri Sep 28, 2018 12:16 am
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Re: Strong Acids vs Weak Acids

Postby KatelinTanjuaquio 1L » Fri Dec 07, 2018 1:22 am

The properties that make an acid strong are weak are the following:

1. Weaker (longer) A-H bond makes it easier to remove H+.
2. Oxoacids more readily lose H+ if resulting anion is stabilized by electron withdrawing atoms which delocalize and stabilized the negative charge.(Delocalized charge makes anions more stable.)

MadisonB
Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

Re: Strong Acids vs Weak Acids

Postby MadisonB » Fri Dec 07, 2018 1:57 am

These are some common strong acids:
HCl - hydrochloric acid
HNO3 - nitric acid
H2SO4 - sulfuric acid (HSO4- is a weak acid)
HBr - hydrobromic acid
HI - hydroiodic acid
HClO4 - perchloric acid
HClO3 - chloric acid

@https://www.thoughtco.com/list-of-strong-and-weak-acids-603642

You can also differentiate a strong versus weak acid using pKa and Ka values. High pKa--> weak acid (more acidic), High Ka values--> strong acid (better disassociation)


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