0
How pure benzoic acid may be separated form a solution of sand and benzoic acid?
Wiki User
∙ 13y ago
A solution of sand in (dissolved) benzoic acid will not nbe possible. It is called a (heterogenous) mixture or suspension of sand in this liquid.
However the separation can be carried out by filtration, centrifugation or sinking the sand down.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoyes.
Add your answer:
Earn +20 pts
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.
Does hydrochloric acid form a precipitate with cupric sulfate solution?
yes.
When HCl is added to the unknown solution bubble form what is the compound in the colorless solution?
dilute hydrochloric acid
What are similarities between salt and acid?
acid and alkalis both conduct electricity both are corrosive acid and alkalis ate subtances which dissolves in water to form aqueous solution with certain properties
Why is the acids and bases are inorganic compound?
They are not always inorganic. For example, benzoic acid, ethanoic acid and ascorbic acid (vitamin c) are all organic compounds. However, acids and bases are generally ionic compounds when in solution. This is because the definition of an acid , as well as something with a pH of less than 7, can be "a substance that can form ions, the only positive ion present being the Hydrogen H+ ion". Similarly a base is the oxide or hydroxide of a metal (or something acting like a metal such as the ammonium ion). Bases that dissolve in water react with the water to form alkalis which have, as their only negative ions, hydroxide ions (OH-). Therefore, all acids and bases must be ionic compounds rather than covalent compounds as they need to form ions in solution. Furthermore, there are many acids that are covalent (such as the organic acids above) and only become acids when in solution. Such an example is thanoic acid which is a covalent compound: CH3COOH. This is not acidic unless it is in the presence of water, when it becomes an acid splitting into ions: CH3COOH -----------> CH3COO- + H+
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.
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.
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?
baking soda
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.
What combination of alcohol and acid will form octyl benzoate?
Benzoic acid and n-octyl alcohol in presence of sulphuric acid on heating form octyl benzoate and water.
What intermolecular force is benzoic acid?
Benzoic acid has an OH group which is polar, so it can form hydrogen bonds.
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.
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.
Why is it necessary to filter the benzoic acid while hot?
because it will form solid when cool
What is the carboxylic acid needed to form isobutyl benzoate?
Benzoic acid esterified with the alcohol isobutanol gives isobutyl benzoate.
What happens when NaOH dissolves in water?
Benzoic acid is only slightly soluble in water. When warmed up it will dissolve. It can then be filtered and cooled down and the benzoic acid will crystallize out. This is a method use to purify the substance.
Can copper sulphate be separated from its solution by crystallization?
Yes, copper sulphate(CuSO4) can be separated from its solution in crystalline form.
