What is a Bronsted-Lowry acid?

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What is a Bronsted-Lowry acid?

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Answer 1 · 2018-08-08T05:06:16

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Explanation:

A $Bronsted-Lowry acid$ $"Bronsted-Lowry acid"$ is a species that DONATES a proton in the form of an hydrogen ion...

$2 H_{2} O (l) ⇌ H_{3} O^{+} + H O^{-}$ $2H_2O(l) rightleftharpoonsH_3O^+ + HO^-$

And, here, water molecules has acted as a $Bronsted-Lowry acid$ $"Bronsted-Lowry acid"$ AND as a $Bronsted-Lowry BASE$ $"Bronsted-Lowry BASE"$ , a proton acceptor...

Of course in water under standard conditions, the given equilibrium is measurable...

i.e. $K_{w} = [H O^{-}] [H_{3} O^{+}] = 10^{- 14}$ $K_w=[HO^-][H_3O^+]=10^(-14)$ ...

And taking logs of both sides...

$- {log}_{10}^{- 14} = {log}_{10} [H_{3} O^{+}] + {log}_{10} [H O^{-}]$ $-log_10^(-14)=log_10[H_3O^+]+log_10[HO^-]$

And so...

$+log_10^(-14)=underbrace(-log_10[H_3O^+]-log_10[HO^-])_(pH+pOH=14)$

And you will use this relationship a lot...

$14=pH+pOH$ ...

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What is a Bronsted-Lowry acid?

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