Parmi les espèces suivantes, quelles sont celles qui...

Parmi les espèces suivantes, quelles sont celles qui constituent des couples acidobasiques? Dans ces couples, quel est l'acide et quelle est la base ? (représentez-les de la manière habituelle : Acide/Base) a) $\mathrm{NH}_3$ e) $\mathrm{AlH}_4^{-}$ i) $\mathrm{H}_2 \mathrm{~S}$ m) $\mathrm{H}_2 \mathrm{O}$ q) $\mathrm{S}^{2-}$ b) $\mathrm{AlH}_3$ f) $\mathrm{NH}_2^{-}$ j) $\mathrm{HO}^{-}$ n) $\mathrm{NH}_4{ }^{+}$ r) $\mathrm{NaOH}$ c) $\mathrm{CH}_4$ g) $\mathrm{NaH}$ k) $\mathrm{CH}_3^{-}$ o) $\mathrm{Na}^{+}$ s) $\mathrm{HS}^{-}$ d) $\mathrm{O}^{2-}$ h) $\mathrm{H}_3 \mathrm{O}^{+}$ 1) $\mathrm{CH}_3{ }^{+}$ p) $\mathrm{Cl}^{-}$ t) $\mathrm{HBr}$

Parmi les espèces suivantes, quelles sont celles qui constituent des couples acidobasiques? Dans ces couples, quel est l'acide et quelle est la base ? (représentez-les de la manière habituelle : Acide/Base)
a) $\mathrm{NH}_3$
e) $\mathrm{AlH}_4^{-}$
i) $\mathrm{H}_2 \mathrm{~S}$
m) $\mathrm{H}_2 \mathrm{O}$
q) $\mathrm{S}^{2-}$
b) $\mathrm{AlH}_3$
f) $\mathrm{NH}_2^{-}$
j) $\mathrm{HO}^{-}$
n) $\mathrm{NH}_4{ }^{+}$
r) $\mathrm{NaOH}$
c) $\mathrm{CH}_4$
g) $\mathrm{NaH}$
k) $\mathrm{CH}_3^{-}$
o) $\mathrm{Na}^{+}$
s) $\mathrm{HS}^{-}$
d) $\mathrm{O}^{2-}$
h) $\mathrm{H}_3 \mathrm{O}^{+}$
1) $\mathrm{CH}_3{ }^{+}$
p) $\mathrm{Cl}^{-}$
t) $\mathrm{HBr}$

Key Concepts

Brønsted-Lowry Acid?Base Theory

This theory defines acids as proton donors and bases as proton acceptors. It introduces the idea that acid-base reactions occur through the transfer of a proton (H+), and it forms the foundation for understanding how different chemical species interact in many types of reactions.

Acid

An acid is any substance that can donate a proton to another species. When an acid loses a proton, it becomes its conjugate base, a key concept in understanding reaction equilibria and the behavior of various compounds in solution or in the gas phase.

Base

A base is any substance that can accept a proton. Upon accepting a proton, a base is transformed into its conjugate acid. This acceptance of a proton is central to many chemical reactions and is fundamental in determining the reactivity of substances.

Conjugate Acid-Base Pair

A conjugate acid-base pair consists of two species that differ by one proton. One member of the pair can donate a proton (acid) while the other can accept a proton (base). Recognizing these pairs is critical in predicting the direction and extent of acid-base reactions.

Proton Transfer

Proton transfer is the process by which a proton is moved from one molecule or ion to another during a chemical reaction. It is the key mechanistic step in many acid-base reactions and is essential for understanding how acids become bases and vice versa.

Transcript

Please give Ace some feedback