(b) What functional group characterizes an alcohol?

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Identify the common structure of an alcohol, which includes a hydroxyl group.

Recognize that the hydroxyl group in an alcohol is represented by the chemical group -OH.

Understand that the -OH group is attached to a saturated carbon atom, meaning the carbon is bonded to other atoms with single bonds.

Note that the presence of the hydroxyl group (-OH) is what primarily gives alcohols their characteristic properties such as solubility in water and reactivity.

Conclude that the functional group characterizing an alcohol is the hydroxyl group (-OH).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. They determine the properties and reactivity of organic compounds. Understanding functional groups is essential for identifying and classifying organic molecules.

Alcohols

Alcohols are organic compounds that contain one or more hydroxyl (-OH) groups attached to a carbon atom. The presence of the hydroxyl group is what characterizes alcohols and influences their physical and chemical properties, such as solubility and boiling point.

Hydroxyl Group

The hydroxyl group (-OH) is a functional group consisting of an oxygen atom bonded to a hydrogen atom. It is polar, which allows alcohols to engage in hydrogen bonding, leading to higher boiling points compared to hydrocarbons of similar molecular weight. This group is fundamental in defining the behavior of alcohols in chemical reactions.

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Related Practice

Textbook Question

(a) What is meant by the term isomer?

Textbook Question

(b) Among the four alkanes, ethane, propane, butane, and pentane, which is capable of existing in isomeric forms?

Textbook Question

(a) What is a functional group?

Textbook Question

(c) Write a structural formula for 1-pentanol, the alcohol derived from pentane by making a substitution on one of the carbon atoms.

Textbook Question

Consider the following organic substances: ethylethanoate, ethylmethylether, hexanol, and propanone. (a) Which of these molecules contains three carbons?

Textbook Question

Consider the following organic substances: ethylethanoate, ethylmethylether, hexanol, and propanone. (b) Which of these molecules contain a C = O group?