After the hydrolysis of ester the change in the concentration of acid at different intervals is calculated by _:
Correct answer: B. Titration with standard alkali
- A. Titration with KMnO4
- B. Titration with standard alkali
- C. Distillation
- D. Evaporation of mixture
Explanation
The change in the concentration of acid at different intervals after the hydrolysis of ester is calculated by titration with standard alkali. In the hydrolysis of ester, the ester is broken down into an alcohol and a carboxylic acid. The carboxylic acid can be titrated with a standard alkali, such as sodium hydroxide (NaOH). The amount of alkali required to neutralize the acid is a measure of the concentration of the acid. The titration is carried out by adding the standard alkali to the acid solution until the acid is neutralized. The endpoint of the titration is indicated by a change in the pH of the solution.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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