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Because depending on the pH the phenolphtalein solution change the color.

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10y ago
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6mo ago

Phenolphthalein is used in ester hydrolysis reactions as an acid-base indicator. It changes color at the endpoint of the reaction, helping to determine when the reaction is complete. In ester hydrolysis, phenolphthalein turns from colorless to pink as the solution goes from acidic to slightly basic.

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16y ago

it can be used as an indicator

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Q: Why use phenolphthalein in ester hydrolysis?
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What can hydrolysis an ester?

Hydrolysis of an ester involves breaking the ester bond by adding water (H2O) through a reaction known as ester hydrolysis. This reaction typically requires the presence of an acid (acidic hydrolysis) or a base (basic hydrolysis) as a catalyst to facilitate the cleavage of the ester bond. The result of hydrolyzing an ester is the formation of its parent carboxylic acid and an alcohol.


Hydrolysis of ester ethyl ethanoate gives what?

Hydrolysis of ester ethyl ethanoate (or ethyl acetate) results in the formation of acetic acid and ethanol. This reaction involves breaking the ester bond through the addition of water, leading to the formation of the corresponding carboxylic acid and alcohol.


What kind of conditions can produce hydrolysis of an ester?

Hydrolysis of an ester can occur under acidic or basic conditions. In acidic hydrolysis, a strong acid like HCl is used to cleave the ester bond, resulting in the formation of a carboxylic acid and an alcohol. In basic hydrolysis, a strong base like NaOH is used to break the ester bond, yielding a carboxylate salt and an alcohol.


What type of reaction has takin place when an ester is broken down to an alkanoic acid and alkanol?

The reaction is called hydrolysis. It involves the ester reacting with water, leading to the cleavage of the ester bond and the formation of an alkanoic acid and an alkanol. This process typically requires the presence of an acid or base catalyst to accelerate the reaction.


Base hydrolysis of an ester is called?

Base hydrolysis of an ester is known as saponification, where the ester is hydrolyzed in the presence of a strong base (e.g. NaOH) to form a carboxylate salt and an alcohol. This reaction is commonly used in soap-making processes.

Related questions

What can hydrolysis an ester?

Hydrolysis of an ester involves breaking the ester bond by adding water (H2O) through a reaction known as ester hydrolysis. This reaction typically requires the presence of an acid (acidic hydrolysis) or a base (basic hydrolysis) as a catalyst to facilitate the cleavage of the ester bond. The result of hydrolyzing an ester is the formation of its parent carboxylic acid and an alcohol.


What conditions can produce hydrolysis of an ester?

Either an acidic of basic condition can produce hydrolysis of an ester. An ester is derived from an alcohol and a carboxylic acid.


Hydrolysis of ester ethyl ethanoate gives what?

Hydrolysis of ester ethyl ethanoate (or ethyl acetate) results in the formation of acetic acid and ethanol. This reaction involves breaking the ester bond through the addition of water, leading to the formation of the corresponding carboxylic acid and alcohol.


What kind of conditions can produce hydrolysis of an ester?

Hydrolysis of an ester can occur under acidic or basic conditions. In acidic hydrolysis, a strong acid like HCl is used to cleave the ester bond, resulting in the formation of a carboxylic acid and an alcohol. In basic hydrolysis, a strong base like NaOH is used to break the ester bond, yielding a carboxylate salt and an alcohol.


Test for ester?

Acid hydrolysis using sulphuric acid and water (equilibrium reaction). The ester splits into a carboxylic acid and alcohol, protons donated from the acid. The solution can then be distilled and the remaining acid can be checked using UV indicator. Acid hydrolysis using sulphuric acid and water (equilibrium reaction). The ester splits into a carboxylic acid and alcohol, protons donated from the acid. The solution can then be distilled and the remaining acid can be checked using UV indicator.


What breaks ester linkage during hydrolysis of a triglyceride?

The enzyme lipase breaks the ester linkages during the hydrolysis of a triglyceride, releasing fatty acids and glycerol molecules.


What type of reaction has takin place when an ester is broken down to an alkanoic acid and alkanol?

The reaction is called hydrolysis. It involves the ester reacting with water, leading to the cleavage of the ester bond and the formation of an alkanoic acid and an alkanol. This process typically requires the presence of an acid or base catalyst to accelerate the reaction.


Base hydrolysis of an ester is called?

Base hydrolysis of an ester is known as saponification, where the ester is hydrolyzed in the presence of a strong base (e.g. NaOH) to form a carboxylate salt and an alcohol. This reaction is commonly used in soap-making processes.


How is an ester bond broken?

An ester bond can be broken through a process called hydrolysis, where water is used to split the ester molecule into its constituent alcohol and carboxylic acid. This reaction can be catalyzed by either acid or base, depending on the specific conditions.


What is always a direct product of the hydrolysis of an ester regardless of whether the reaction is performed under acidic or basic conditions?

The direct product of the hydrolysis of an ester, under both acidic and basic conditions, is an alcohol and a carboxylic acid.


What is the bond broken by lipase?

Lipase breaks the ester bond in triglycerides, leading to the hydrolysis of fats into fatty acids and glycerol.


Which bond will release an acid and an alcohol when it is hydrolyzed?

An ester bond will release an acid and an alcohol when hydrolyzed. This reaction is called ester hydrolysis and breaks the ester into its constituent carboxylic acid and alcohol through the addition of water.