Strong Acid or Weak Acid

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Josh Clark 1J
Posts: 11
Joined: Wed Sep 21, 2016 2:59 pm

Strong Acid or Weak Acid

Postby Josh Clark 1J » Sun Nov 20, 2016 5:31 pm

Is there a way to determine whether an acid is strong or weak by observing it's chemical formula?

Shirley_Zhang 3O
Posts: 35
Joined: Wed Sep 21, 2016 2:56 pm

Re: Strong Acid or Weak Acid

Postby Shirley_Zhang 3O » Sun Nov 20, 2016 9:28 pm

the strong acids are usually composed of hydrogen + group 1 or group 2 elements because these compound desolve easily in solvent, thus contributing a large increase to the concentration of hydronium ions.

I don't think there's a way in determining the strength of an acid based simply on the chemical formulas.

Navarro_Bree_1D
Posts: 24
Joined: Wed Sep 21, 2016 3:00 pm

Re: Strong Acid or Weak Acid

Postby Navarro_Bree_1D » Tue Nov 22, 2016 10:02 pm

Here is a general rule of thumb when determining the relative strength of acids:

1. Is the acid organic or inorganic?
--Organic acids (compounds with carbon) are usually weaker than inorganic acids (compounds WITHOUT carbon)

**NOTE: Acids can be modified to be stronger**

2. What elements make up the organic acid?
--Elements with LOW electronegativity results in a weaker acid
--Elements with HIGH electronegativity results in a stronger acid

Higher electronegativity delocalizes the negative charge thus making the compound more stable and bond stronger.

NinaSheridan
Posts: 30
Joined: Wed Sep 21, 2016 2:58 pm

Re: Strong Acid or Weak Acid

Postby NinaSheridan » Fri Nov 25, 2016 8:47 pm

As to the above comment ^^, you mean electronegativity of a specific element like the central element? Or all the average of the elements overall?


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