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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).
Given a pure sample that is either pure benzoic acid or 2-naphthol give a procedure that can be used to determine the identity of the sample?
Lets see. Add neutral ferric chloride to the sample solution. A coloured solution is obtained if it is 2-naphthol (most phenols give colour with neutral ferric chloride solution). Add sodium bicarbonate to the sample solution. Carboxylic acids evolve carbon dioxide gas. Phenols (except strong ones like picric acid) does not. Both 2-naphthol and benzoic acid will evolve hydrogen when treated with metallic sodium (test not advisable to do) and NaOH. Phenols form pleasent smelling esters when treated with carboxylic acids where as benzoic acid will be fruity odour with alcohols or phenols. Both benzoic acid and 2-naphthol melts about 1220C whereas the boiling point of benzoic acid is 2490C and that of 2-naphthol is 2850C.
How could you produce water from an acid solution?
One way to produce water from an acid solution is through a neutralization reaction. By adding a base to the acid solution, the acid and base will react to form water and a salt. The salt can then be separated from the water to obtain pure water.
What is the colour and smell of benzoic acid?
Benzoic acid looks like a very clear white powder , crystalline flakes. It smells like urine and even the smell is very irritant to eyes ! Made the experience of putting it close to my nose ! Be careful.
Is benzoic acid a solid or liquid?
Benzoic acid is a solid at room temperature. It appears as a white crystalline powder and has a melting point of about 122 degrees Celsius (252 degrees Fahrenheit). In its solid form, it is often used as a preservative in food products and in various chemical applications. When heated, it can melt and become a liquid.
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 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).
Which of These compound does not form a clear solution with the cold water.. a.benzoic acid b.sugar c.backing power d.caustic soda?
Benzoic acid does not form a clear solution with cold water. It tends to remain as a suspension or may partially dissolve, causing cloudiness in the solution.
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.
Why is benzoic acid is in molecular form at pH of 2?
Benzoic acid is a weak acid, which means that its dissociation is reversible. C6H5COOH -----> C6H5COO- + H+ At pH 2, there are a lot of H+ ions in the solution. According to Le Chatelier's Principle, the equilibrium will shift to the left to favor the opposite reaction where Benzoic acid is produced, to reduce the amount of H+ in the solution. Therefore, an insignificant amount of benzoic acid will dissociate, while most of it remains in the molecular form.
What is the carboxylic acid needed to form isobutyl benzoate?
Benzoic acid esterified with the alcohol isobutanol gives isobutyl benzoate.
What is the product of benzoic acid reacting with NH2?
benzoic acid + Sodium Hydroxide ==> water + sodium benzoate
What results from a mixture of benzoic acid to and HCL?
You will get benzoic acid as a result. The benzoic salt will gain a Hydrogen from the HCl; thus, becoming benzoic acid, and the Cl shall remain by itself in suspension if you're mixing the two together in an aqueous solution.
What is the equation for the reaction of benzoic acid and zinc oxide?
The reaction between benzoic acid and zinc oxide does not lead to a simple single equation because benzoic acid is a weak acid that does not readily form salts with metals like zinc. However, if the reaction were to occur, it might involve the displacement of hydrogen from benzoic acid by zinc to form zinc benzoate and hydrogen gas.
Reaction of benzoic acid with sodium bicarbonate?
When benzoic acid reacts with sodium bicarbonate, it results in the formation of sodium benzoate, carbon dioxide gas, and water. This reaction is an example of an acid-base reaction where the benzoic acid (acid) reacts with sodium bicarbonate (base) to form sodium benzoate (salt) and carbon dioxide gas.
What intermolecular force is benzoic acid?
Benzoic acid has an OH group which is polar, so it can form hydrogen bonds.
What combination of alcohol and acid will form octyl benzoate?
Octyl benzoate can be formed by reacting octanol (alcohol) and benzoic acid in the presence of a catalyst like sulfuric acid. The reaction will produce octyl benzoate and water as byproduct.
