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Questions and Answers
What is the saponification method used for?
What is the saponification method used for?
- Determining the esters present in essential oils (correct)
- Determining functional groups in organic compounds
- Determining the percentage of water in organic compounds
- Determining the molecular weight of organic compounds
What is the purpose of refluxing a sample with KOH dissolved in alcohol in the saponification method?
What is the purpose of refluxing a sample with KOH dissolved in alcohol in the saponification method?
- To form carboxylic acid and alcohol
- To determine the percentage of alkali in the sample
- To convert ester to alcohol and carboxylic acid (correct)
- To determine the molecular weight of ester
What is the purpose of using a standard acid solution in the saponification method?
What is the purpose of using a standard acid solution in the saponification method?
- To neutralize the excess amount of alkali (correct)
- To determine the percentage of ester in the sample
- To determine the percentage of alkali in the sample
- To determine the percentage of water in the sample
When can aqueous solution of NaOH or KOH be used for ester hydrolysis?
When can aqueous solution of NaOH or KOH be used for ester hydrolysis?
What can be determined if the molecular weight of ester is known in the saponification method?
What can be determined if the molecular weight of ester is known in the saponification method?
What is the saponification equivalent?
What is the saponification equivalent?
What is used to estimate the amino group in organic compounds?
What is used to estimate the amino group in organic compounds?
Which method involves the reaction of excess bromate-bromide solution with an amine sample in the presence of HCl?
Which method involves the reaction of excess bromate-bromide solution with an amine sample in the presence of HCl?
What is used for readily hydrolysed esters?
What is used for readily hydrolysed esters?
Which solvent can be used to increase the reaction rate in a solution of KOH?
Which solvent can be used to increase the reaction rate in a solution of KOH?
What is the excess acetylating mixture hydrolyzed with in the acetylation method?
What is the excess acetylating mixture hydrolyzed with in the acetylation method?
Which method involves titrating a sample with standard acid to the neutral point, then adding bromophenol blue indicator and benzene to reach a green end point?
Which method involves titrating a sample with standard acid to the neutral point, then adding bromophenol blue indicator and benzene to reach a green end point?
Which solution is used for insoluble esters in water that are easily hydrolyzed?
Which solution is used for insoluble esters in water that are easily hydrolyzed?
Which compound is reacted with excess bromate-bromide solution in the bromination method?
Which compound is reacted with excess bromate-bromide solution in the bromination method?
Which compound is used to replace the amino group in the acetylation method?
Which compound is used to replace the amino group in the acetylation method?
How can the % of amino group in a sample be calculated using the given formula V = volume of NaOH, N = conc. of NaOH, W = weight of sample, M.wt = M.wt of NH2?
How can the % of amino group in a sample be calculated using the given formula V = volume of NaOH, N = conc. of NaOH, W = weight of sample, M.wt = M.wt of NH2?
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