Question

When a carboxylic acid is dissolved in isotopically labeled water, the label rapidly becomes incorporated into both oxygen atoms of the carboxylic acid. Explain.

Answer 1

When a carboxylic acid is dissolved in isotopically labeled water, the label rapidly becomes incorporated into both oxygen atoms of the carboxylic acid.

Carboxylic acid.

Carboxylic acid is a molecule that has a functional group called carboxyl linked to it.

Carboxylic acid is represented by the compound R-COOH. They use the acidity of carboxylic acid to produce several compounds.

Mechanism when carboxylic acid reacts with water:-

Step 1:- the equilibrium that results from inserting a water molecule across the C=O double bond between a hydrated carboxylic acid and its hydrated version.

Step 2:-These two states are quickly alternated by the acid particles. The OH group added when traveling to the right comes from a water molecule in the solution as opposed to the other three OH groups, which can all be ejected when moving to the left. As a result, an equilibrium will be reached by unlabeled, mono-labeled, and doubly-labeled carboxylic acid molecules.

step 3:-The solvent is labeled water. Thus there are a lot more labeled oxygen atoms accessible than unlabeled ones. Consequently, the equilibriums mentioned above are pushed to the right, and the bulk of acid molecules have two designated oxygen atoms.

Hence, When a carboxylic acid is dissolved in isotopically labeled water, the label rapidly becomes incorporated into both oxygen atoms of the carboxylic acid.

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