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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
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Ethene dissolves in con H2SO4 ethane does not explain?
Ethene is an unsaturated compound so adds up one molecule of sulphuric acid and addition product becomes dissolved in acid but ethane is a saturated compound so does not react and dissolves in sulphuric acid.
How is the Gerber method of fat estimation done?
By adding sulphuric acid to remove it from the proteins, (sped up by addition of amyl alcohol , waterbath at 65 degree and a centrifuge all in a butyometer(spelling?).....
Can KMnO4 be acidified with HCl and HNO3?
Yaa, but not useful, because Hcl will release Cl whihc will oxidized by KMno4 and HNO3 is it self a good oxidizing acid.
How is the completeness of separation of the benzoic acid crystals from sodium chloride known with the addition of AgNO3 solution?
Silver Nitrate solution produces a white precipitate in the presence of chloride ion. The equation is AgNO3 + Cl- ----> AgCl(s) . So if benzoic acid is completely free of sodium chloride there will be no white precipitate. You can go a stage further by weighing an aliquot of benzoic acid crystals and titrating with a known strength silver nitrate solution. By calculation you can then find just exactly how much sodium chloride is left contaminating the benzoic acid.
What is the reaction equation of 1-butene with sulfuric acid?
1-Butene or 2-butene on reaction with concentrated sulphuric acid produce an unstable thick oily liquid sec.butyl sulphonic acid which on dilution with water produce sec.butyl alcohol, the addition follows the Markonikov's rule.
Ethene dissolves in con H2SO4 ethane does not explain?
Ethene is an unsaturated compound so adds up one molecule of sulphuric acid and addition product becomes dissolved in acid but ethane is a saturated compound so does not react and dissolves in sulphuric acid.
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?
By adding sulphuric acid to remove it from the proteins, (sped up by addition of amyl alcohol , waterbath at 65 degree and a centrifuge all in a butyometer(spelling?).....
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.
