Respuesta :
Answer: Option (C) is the correct answer.
Explanation:
According to Arrhenius, bases are the species which when dissolved in water will give hydroxide ions, that is, [tex]OH^{-}[/tex].
For example, [tex]NaOH + H_{2}O \rightarrow Na^{+} + OH^{-}[/tex]
Arrhenius acids are the species which when dissolved in water will give hydrogen ions, that is, [tex]H^{+}[/tex].
For example, [tex]CH_{3}COOH + H_{2}O \rightleftharpoons H_{3}O^{+} + CH_{3}COO^{-}[/tex]
In water, when an acid loses a hydrogen ion then the specie formed is known as conjugate base.
Here, [tex]CH_{3}COO^{-}[/tex] is the conjugate base of [tex]CH_{3}COOH[/tex].
Similarly, species which accept the hydrogen ion result in the formation of conjugate acid.
Hence, [tex]H_{3}O^{+}[/tex] is the conjugate acid of [tex]H_{2}O[/tex].
Thus, we can conclude that [tex]CH_{3}COO^{-}[/tex] is the conjugate base.
Taking into account the Brønsted-Lowry acid-base theory, CH₃COO₋ is a conjugate base.
What is Brønsted-Lowry acid-base theory
The Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.
According to this theory, acids are proton donors while bases are proton acceptors. That is, an acid is a species that donates an H⁺ proton while a base is a chemical species that accepts an H⁺ proton from the acid.
So, reactions between acids and bases are H⁺ proton transfer reactions, causing the acid to form its conjugate base and the base to form its conjugated acid by exchanging a proton.
In other words, a conjugate base is an ion or molecule resulting from the acid that loses the proton, while a conjugate acid is an ion or molecule resulting from the base that gains the proton:
acid + base ⇄ conjugate base + conjugate acid
Statements true
In this case, when an acid loses a hydrogen ion then the specie formed is known as conjugate base.
Then, CH₃COO₋ is the conjugate base of CH₃COOH.
The correct statement is option C) CH₃COO₋ is a conjugate base.
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