Спряжені пари кислот та основ

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What are Conjugate Acid-Base Pairs?

In a reaction, for every acid in the reactants, there is a conjugate base in the products
In a reaction, for every base in the reactants, there is a conjugate acid in the products
The reactant acid and conjugate base or the reactant base and the conjugate acid are referred to as: Conjugate Pairs

Note: The acid pair always has one more hydrogen ion (H $^+$ ) than its conjugate base!

A strong acid will produce a weak base (and a weak base will form a strong acid)

Example: HCl is a strong acid which produces a conjugate base of Cl which is a weak base!

A weak acid will produce a strong base (and a strong base will produce a weak acid)

Example: HF is a weak acid which produces a conjugate base of F which is a strong base!

In the reaction below, what are the conjugate pairs?

$HCHO_{2}$ + $H_{2}O$ → $CHO_{2}$ + $H_{3}O$

Illustrated · 1 min

Conjugate Acid-Base Pairs

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(Video) Conjugate Acid-Base Pairs

By: The Organic Chemistry Tutor

This video first goes over the differences between a Lewis acid and base, Bronsted-Lowry acid and base, and Arrhenius acid and base. A few examples are given that give the opportunity to check your understanding of acids/bases and identifying their appropriate conjugate molecule.

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