What is the name for the following polyatomic ion?
CH3CO2-1
A acetate
B formate
C carboxylic
D acidic
E acetic
The Correct Answer and Explanation is :
The correct answer is A) acetate.
Explanation:
The polyatomic ion CH₃CO₂⁻¹ is commonly known as acetate. This ion is derived from acetic acid (CH₃COOH) when it donates a proton (H⁺). The acetate ion is important in various biochemical processes and is widely found in both organic chemistry and biochemistry.
- Structure and Composition:
Acetate has a simple structure comprising two carbon atoms, four hydrogen atoms, and two oxygen atoms. The ion can be represented as CH₃COO⁻, where the negative charge is typically found on one of the oxygen atoms. This resonance structure allows for stability in the ion, as the charge can be delocalized between the two oxygen atoms. - Formation and Reactions:
Acetate is formed when acetic acid loses a hydrogen ion (H⁺), making it a conjugate base. The presence of acetate in solutions is a key indicator of weak acids and bases. In biological systems, acetate plays a crucial role in energy production. For example, it is a central component in the citric acid cycle, where it is converted into acetyl-CoA, a vital molecule in metabolism. - Applications:
Acetate is also widely used in various industrial applications. It is a common solvent, an important precursor in the synthesis of polymers, and is found in food preservation as sodium acetate. The ion’s ability to interact with metal ions makes it useful in various chemical processes and experiments. - Relation to Other Options:
- Formate (B) refers to the ion HCOO⁻, derived from formic acid.
- Carboxylic (C) refers to a class of organic compounds containing the carboxyl group (-COOH).
- Acidic (D) and Acetic (E) describe properties and other forms of the compound but do not refer to the specific ion in question.
In summary, acetate (CH₃CO₂⁻¹) is a vital polyatomic ion with significant biochemical and industrial relevance, distinguishing it from related compounds and terms.