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Acid base theories are important to unde...

Acid base theories are important to understand the role of many substances in different reactions. Different theories are in practice which have advantages as well as limitations at their level. We always consider most convenient theory under the given conditions.
Which of the following is strong conjugate base

A

`F^(-)`

B

`CI^(-)`

C

`Br^(-)`

D

`I^(-)`

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To determine which of the following is a strong conjugate base, we need to understand the relationship between acids and their conjugate bases. Here’s a step-by-step solution: ### Step 1: Understand the Concept of Conjugate Bases - A conjugate base is formed when an acid donates a proton (H⁺). The strength of a conjugate base is inversely related to the strength of its corresponding acid. This means that a weak acid will have a strong conjugate base. ### Step 2: Identify the Acids and Their Conjugate Bases - Consider the examples of common acids: - Hydrofluoric acid (HF) → Conjugate base: F⁻ - Hydrochloric acid (HCl) → Conjugate base: Cl⁻ - Hydrobromic acid (HBr) → Conjugate base: Br⁻ - Hydroiodic acid (HI) → Conjugate base: I⁻ ### Step 3: Compare the Strengths of the Acids - The strength of these acids can be ranked as follows: - HF < HCl < HBr < HI - This means HF is the weakest acid among them. ### Step 4: Determine the Strength of the Conjugate Bases - Since HF is the weakest acid, its conjugate base (F⁻) will be the strongest among the conjugate bases derived from the other acids: - F⁻ > Cl⁻ > Br⁻ > I⁻ ### Step 5: Conclusion - Therefore, the strongest conjugate base from the options provided is F⁻ (the conjugate base of HF). ### Final Answer - The strong conjugate base is **F⁻**. ---
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