Why does an acidic strength increase down the group?
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Solution
Acid strength:
Acid strength is just a measurement of just an acid's ability to lose its H+ ion.
A strong acid's dissociation in solution is nearly complete, with the exception of its most concentrated solutions.
An acidic strength increase down the group is:
The acid strength increases as the nonmetal's size increases because the bond strength reduces as a function of size, and this has a larger influence than the electronegativity.
In fact, because HF is so tiny, the hydrogen-fluorine connection is extremely strong and difficult to break.