What are strong Bronsted acids?

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What are strong Bronsted acids?

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Answer 1 · 2016-06-23T08:40:11

These are acids for which the following equilibrium lies strongly to the right: $H A + H_{2} O ⇌ H_{3} O^{+} + A^{-}$ $HA+H_2OrightleftharpoonsH_3O^+ + A^(-)$

Explanation:

Examples of strong Bronsted acids include $H C l$ $HCl$ , $H B r$ $HBr$ , $H I$ $HI$ , $H_{2} S O_{4}$ $H_2SO_4$ , and $H C l O_{4}$ $HClO_4$ . Solutions of these acids are stoichiometric in $H_{3} O^{+}$ $H_3O^+$ and $X^{-}$ $X^-$ .

Of course, when we write the acidium species in water, $H_{3} O^{+}$ $H_3O^+$ , this is more of a conceptual representation than the reality. $H_{3} O^{+}$ $H_3O^+$ in water is probably a cluster of 4-5 water molecules with an extra proton associated to give, say $H_{9} O_{4}^{+}$ $H_9O_4^+$ . If we treat acid as $H_{3} O^{+}$ $H_3O^+$ or even as $H^{+}$ $H^+$ , we are nevertheless able to do calculations and measurements successfully.

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What are strong Bronsted acids?

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