Everything about Weak Acid totally explained
A
weak acid is an
acid that doesn't completely donate all of its hydrogens when dissolved in water. These acids have higher
pH compared to
strong acids, which release all of their hydrogens when dissolved in water.
Explanation
Weak acids don't
ionize in a
solution to a significant extent; that is, if the acid was represented by the general formula
HA, then in aqueous solution a significant amount of undissociated HA still remains. Weak acids in water dissociate as
The greater the value of K
a, the more the formation of H
+ is favored, and the lower the
pH of the solution. The K
a of weak acids varies between 1.8×10
-16 and 55.5. Acids with a K
a less than 1.8×10
-16 are weaker acids than water. Acids with a K
a of greater than 55.5 are
strong acids and almost totally dissociate when dissolved in water.
Examples
The vast majority of acids are weak acids. Organic acids are a large subset of weak acids. However, there are some
mineral acids in this field.
Further Information
Get more info on 'Weak Acid'.
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