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Why is it necessary to extract ether layer with sodium hydroxide when reacting benzoic acid with hydroxide ion?
Wiki User
∙ 15y ago
It depends on the overall reaction. If the carboxylic acid is an impurity in the reaction (undesired), then washing with sodium hydroxide will extract the carboxylic into the aqueous layer, and it can then be disposed. The reaction for this looks as follows:
(ring)-COOH + NaOH -> (ring)-COO-Na+ + H20
Where the ring loses a proton to the hydroxide ion and becomes water soluble.
Wiki User
∙ 15y ago
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Why is it necessary to extract the ether layer with sodium hydroxide?
In this step of the experiment you are trying to separate benzoic acid from biphenyl an impurity. Sodium hydroxide reacts with benzoic acid to form (ar-O-O(-)na(+)) and (H2O), this allows for the ether layer containing biphenyl to separate as the precipitant, which we can now extract and discard.
Why is it necessary to prepare sodium extract for the detection of foreign elements?
We need to prepare sodium extract for the detection of foreign elements because foreign elements are found in organic compound bonded covalently. As a result they cannot be detected through organic compound directly. Hence they are first converted into ionic compound with the help of sodium extract
Why you use sodium extract for detection of elements?
we use sodium extract bcz it converts covalent compounds into ionic form..
Why can't you extract lead from lead oxide but you can with mercury and mercury oxide?
actually you can still extract lead from lead oxide, but you need to do this experiment with carbon or other reducing agent e.g. hydrogen and with a high temperature Celsius. But the reason that you can extract the mercury from the mercury oxides exactly is the higher reactivity of the lead. higher the reactivity means more difficult to extract the metals from the ore. so it is possible for lead to extract it from the lead oxide
What is bornite used for?
It is used to extract copper.
Why is it necessary to extract the ether layer with sodium hydroxide?
In this step of the experiment you are trying to separate benzoic acid from biphenyl an impurity. Sodium hydroxide reacts with benzoic acid to form (ar-O-O(-)na(+)) and (H2O), this allows for the ether layer containing biphenyl to separate as the precipitant, which we can now extract and discard.
Why is benzoic acid is extracted into ether then extracted into an alkali solution prior to being precipitated with strong acid in its preparation with grignard reagent?
When you're attempting to extract benzoic acid from other organic compounds, it is necessary to change its pH by adding a layer of an basic compound such as 1M NaOH so that the benzoic acid then can be separated from the organic layer within a separatory funnel. When in NaOH, the benzoic acid loses a proton and thus becomes its conjugate base (the benzoate ion). The benzoate ion is charged and thus become miscible in the aqueous layer. To extract benzoic acid (ie get it to precipitate out of solution), a strong acid such as HCl must be added to solution. After the extraction, lower the pH of the solution, and recrystalize (use ice after the recrystalization to get benzoic acid crystals to crash out).
What will be the colour of grape extract in aqueous sodium hydroxide?
Violet
How do you separate benzoic acid from a mixture of benzoic acid and toluene using extraction?
Make a solution of Sodium Hydroxide or Sodium Carbonate and do three to four solvent solvent extractions using the aqueous base and the mixture o benzoic acid and toluene. Because benzoic acid reacts with base to form the water soluble carboxylate ion, it will react and the dissolve in the aqueous solution. Upon separation of the two phases acidify the aqueous extract with dilute HCl, a white needle-like precipitate of benzoic acid will form when the solution becomes acidic. Simply filter the crystals, wash with cold water, and then recrystallize using a mixture of 50/50 water and methanol or some other suitable solvent.
Why is aqueous solution sodium extract alkaline?
Because this solution contain sodium hydroxide.
What are the ingredients in Proactiv toner?
The ingredients in Proactiv toner are Aloe Vera, Chamomile Extract, Panthenol, Allantoin, and Witch Hazel Extract. The toner also contains propylparaben, sodium hydroxide,glycerin, glycolic acid, and anthemis nobilis flower extract.
Why scientists in 1800 could not extract aluminium from alumina?
The necessary technological conditions did not exist.
How do you separate benzoic acid from a mixture of CONGO RED and salt?
Dissolve the mixture in an apolar organic solvent, such as diethyl ether, and extract the acid with the addition of NaOH. The bezoic acid with ionize and go into the aqueous solution. Separate the two layers and add HCl to the aqueous layer to precipitate the benzoic acid. Wash the remaing ether solution with water and dry it with an anhydrous salt. Filter the ether solution and then remove the ether, the solvent, in order to obtain the pure benzoin.
What are the ingredients of Marlboro cigarettes?
They two main ingredients in Marlboro cigarettes are tobacco and water. They also contain sugars, propylene glycol, glycerol, licorice extract, diammonium phosphate, ammonium hydroxide, cocoa and cocoa products, carob bean and extract, and natural and artificial flavors.
Why we need to separate mixture?
Separation is necessary to extract useful components.For example salt from ocean waters, iron from minerals, argon fro air.
Why is it necessary to prepare sodium extract for the detection of foreign elements?
We need to prepare sodium extract for the detection of foreign elements because foreign elements are found in organic compound bonded covalently. As a result they cannot be detected through organic compound directly. Hence they are first converted into ionic compound with the help of sodium extract
What does extract mean in vanilla extract?
Extract in "vanilla extract" is simply the liquid extracted from the insides of a vanilla bean.
