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Precipitate of salicylic acid dissolves after addition of excess sulphuric acid?
Wiki User
∙ 15y ago
Serious need thus exists in this art for the improved precipitation and purification of salicylic acid from such aqueous solutions.
Wiki User
∙ 15y ago
The precipitate of salicylic acid dissolves in excess sulphuric acid due to the formation of a complex between salicylic acid and sulphuric acid, which increases the solubility of the precipitate. This reaction results in the formation of a colorless solution, as the salicylic acid is converted into its conjugate base form.
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Ethene dissolves in con H2SO4 ethane does not explain?
Ethene can react with concentrated sulfuric acid (H2SO4) to form ethyl hydrogen sulfate, which is soluble in sulfuric acid. Ethane, being a saturated hydrocarbon, does not undergo this reaction with sulfuric acid and thus does not dissolve in it.
Why the solubility of salicylic acid in water change when hydrochloric acid is added?
The addition of hydrochloric acid protonates the salicylic acid molecules, converting them into their water-soluble salt form. This increases the solubility of salicylic acid in water as the salt form has greater aqueous solubility due to its ionic nature.
Conclusion for silver nitrate precipitate?
In conclusion, the formation of a white precipitate upon the addition of silver nitrate indicates the presence of a chloride ion in the solution. This reaction is commonly used in qualitative analysis to test for the presence of chloride ions in a sample.
What is Reverse precipitation titration?
Reverse precipitation titration is a method used to determine the concentration of anions in a solution. It involves the gradual addition of a cationic titrant to a solution containing the unknown anion until a visible precipitate forms. The endpoint is reached when all the anion has reacted with the cation, resulting in the formation of a solid precipitate.
Requirements for precipitation titration?
Precipitation titration requires a soluble reactant that forms a precipitate upon reaction with the analyte, a suitable indicator to detect the endpoint of the titration, a method to control the addition of the titrant, and conditions under which the analyte and titrant concentrations are stoichiometric. Good stirring and controlled temperature may also be necessary for accurate results.
Ethene dissolves in con H2SO4 ethane does not explain?
Ethene can react with concentrated sulfuric acid (H2SO4) to form ethyl hydrogen sulfate, which is soluble in sulfuric acid. Ethane, being a saturated hydrocarbon, does not undergo this reaction with sulfuric acid and thus does not dissolve in it.
Is the addition of water to concentrated sulphuric acid chemical or physical change?
Chemical change
How do you identify zinc cholride?
Add sulphuric acid to salt pungent smell of HCl and white fumes with Ammonia confirm the presence of chloride, in aqueous solution of salt add H2S the black precipitate are formed, in clear solution the addition of small quantity of NaOH gives white ppts. which become soluble in excess, it is the confirmation of Zinc.
Name the addition product formed by ethene and water?
Ethene reacts with water in presence of sulphuric acid and forms Ethyl alcohol.
How can you test a solution for the barium ions?
Acidify the given solution with a few drops of concentrated HNO3 followed by the addition of 4 mol dm-3 sulphuric acid or ammonium sulphate. A white precipitate implies that there are Barium (II) ions present in the solution. The objective of the test give above is to recognize the Barium(II) ions as the white precipitate of barium sulphate which is not soluble in most of the solvents. Adding a sulphate solution at first might cause distractions as other cations such as strontium also make white precipitates with sulphate ions. Those other precipitates dissolve in dilute nitric acid.
What has the author Clifford D Carpenter written?
Clifford D. Carpenter has written: 'The addition compounds of organic substances with sulfuric acid ..' -- subject(s): Sulphuric acid
What happens when alcohol and perfume mixed?
it_evaporates">it evaporatesThe addition of alcohol "fixes" the scent resulting in the fragrance lasting longer on the skin.
How is the Gerber method of fat estimation done?
The Gerber method of fat estimation involves mixing milk with sulfuric acid and centrifuging it to separate the fat. The fat layer is then measured and compared to a standard to determine the fat content of the milk. It is a widely used method in dairy industry for accurate estimation of fat content in milk.
What are degrades?
degradative plasmids are types of plasmids present in certain bacterias such as pseudomonas putida which impart the ability of degrade xenobiotic compounds such as salicylic acid, 2-4D etc.there are 3 such plasmids-1)CAM plasmid- which degrades camphor.2)XYL ,, - ,, ,, xylene.3)NAH ,, - ,, ,, napthalene.in addition to this CAM also has octane degrading OCT part & NAH has salicylic acid degrading SAL part.
Why is Barium Sulphate used in the limit test for sulphates?
Barium sulfate is very sparingly soluble. Any addition of it to a solution containing sulfate or barium will almost immediately cause a precipitate to form.
How can you Precipitate beta casein by using ammonium sulfate?
Addition of ammonium sulfate uses up the available polar contacts with water, effectively stealing them from the proteins and causing them to aggregate, so if you add ammonium sulfate to milk as it is slightly heated (40C), after enough addition all of the protein will precipitate out, that is after the ammonium sulfate takes up all of the available polar bond from the water. After that you would still have to isolate and purify the casein. I suggest using acidification or column chromatography.
How is a precipitate created?
A precipitate is formed when two chemicals combine where one or more of which contains an "insoluble" element or compound. All Carbonates and Phosphates except Ammonium are insoluble. In addition, all Hydroxides except Strontium and Barium are insoluble. All Sulfides minus group II and Ammonium are also insoluble. Finally, all Oxides are also insoluble and will mandate the production of a precipitate in a reaction. It is important to remember that ALL group I elements, Ammonium, Strontium and Barium are soluble and should not be considered.
