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Why add of little amount from acetic anhydride in synthesis of acetanilide?
Wiki User
∙ 6y ago
Acetic anhydride and aniline are the reactants for the preparation of acetaanilide.
Wiki User
∙ 6y ago
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How do you find adulteration in oil?
Heat small amount of vegetable ghee with acetic anhydride. Droplets of oil floating on the surface of unused acetic anhydride indicates the presence of wax or hydrocarbons. (ii) Adulteration of dyes in fat Heat 1mL of fat with a mixture of 1mL of conc. sulphuric acid and 4mL of acetic acid. Appearance of pink or red colour indicates presence of dye in fat. (iii) Adulteration of argemone oil in edible oils To small amount of oil in a test-tube, add few drops of conc. HNO3 and shake. Appearance of red colour in the acid layer indicates presence of argemone oil.
Why acetanilide brominates in the ortho and para positions and the amount of o-bromoacetanilide?
The polarization of bromine in bromoacetanilide reaction
Suppose 5.0 g of salicylic acid is heated with an excess amount of acetic acid. What is the expected yield of acetylsalicylic acid?
This reaction will not proceed, as the equilibrium is far to the left. In order to synthesize acetylsalicylic acid, one must use acetic anhydrate, and the reaction forms acetic acid instead of water.
How do you make vinegar from glacial acetic acid?
>> you cant FALSE! If you have glacial acetic acid, which is 100% acetic acid, simply add it to 9 times the amount of water. This way, you will have 10% acetic acid, which is essentially 10% tabletop vinegar. For the opposite, however, you can do as well, but it requires MUCH more effort and specialised equipment (at least a refrigerator and a vacuum pump).
Why is a large excess of acetic acid used in the preparation of isopentyl acetate?
Esterification of an acetic acid with isopentyl alcohol can can be used to prepare isopentyl acetate because the equilibria would not favor the formation of the ester, so equilibira will shift to the right IF we use excess amount of one of the reagents (acetic acid). We used large amounts of acetic acid because it's less expensive and it's easier to remove from a reaction mixture than isopropyl alcohol.
What percent salicylic acid in aspirin?
37.16% is the expected yield in the reaction of salicylic acid and acetic anhydride used to form aspirin.
How do you find adulteration in oil?
Heat small amount of vegetable ghee with acetic anhydride. Droplets of oil floating on the surface of unused acetic anhydride indicates the presence of wax or hydrocarbons. (ii) Adulteration of dyes in fat Heat 1mL of fat with a mixture of 1mL of conc. sulphuric acid and 4mL of acetic acid. Appearance of pink or red colour indicates presence of dye in fat. (iii) Adulteration of argemone oil in edible oils To small amount of oil in a test-tube, add few drops of conc. HNO3 and shake. Appearance of red colour in the acid layer indicates presence of argemone oil.
Why acetanilide brominates in the ortho and para positions and the amount of o-bromoacetanilide?
The polarization of bromine in bromoacetanilide reaction
Aspirin is made by the reaction of salicylic acid with acetic an hydride what is the theoretical yield of aspirin if 85.0 grams of salicylic acid is treated with excess acetic an hydride?
Since salicylic acid is being reacted with excess acetic anhydride, salicylic acid is the limiting reactant of the reaction. The balanced equation of the reaction of salicylic acid and acetic anhydride indicates that their is a 1:1:1:1 ratio between every reactant and product. Based on this, it can be concluded that the moles of salicylic acid, if reacted entirely, will yield an equivalent amount of moles of aspirin. To find the theoretical yield, you must know the molecular weight of aspirin and salicylic acid. First, the amount of moles of salicylic acid must be calculated by dividing the gram amount of salicylic acid, which is 85 grams, and dividing it by its molecular weight, which is 138.12 grams per mole.85.0/138.12= 0.615 moles of salicylic acidThis is the mole amount of salicylic acid as well as the theoretical mole amount of aspirin. To convert the mole amount of aspirin into grams, this figure be multiplied by the molecular weight of aspirin, which is 180.15980.615 x 180.1598 = 111 grams of aspirin (when rounded to 3 significant figures)
What is an acetimeter?
An acetimeter is an instrument used to estimate the amount of acetic acid in vinegar.
H2SO4 in aspirin?
Yes. ^ Well to improve on this, in simple terms. A catalyst is something that brings on the reaction, in this case the liquid catalyst can only contain a little amount of water otherwise side reactions will occur and this would impact (reduce) the yield of aspirin - not good, sulfuric acid is usually used because it is 98% pure, phosphoric acid can also be used but it is only about 85% pure, still OK. HCL in its most concentrated form is only 37% pure and there fore no good at all. In a shorter to the point answer, H2SO4 is a pure catalyst which will give you a close to accurate yield of aspirin.
What is the difference between food grade peroxide and regular peroxide of the same strength?
"Regular" hydrogen peroxide often contains a small amount of acetanilide as a stabilizing agent.
How do you dilute acetic acid by volume?
It can be diluted by adding the appropriate amount of water to the solution.
The amount of heat involved in the synthesis of 1 mole?
6.022 * 10^23
Is mayonnaise an electrolyte?
Mayonnaise is not a particularly good electrolyte but, the small amount of acetic acid in it will ionize and carry a current.
How cell may vary the amount of enzyme?
Two main ways: synthesis and degradation. Each step in the process leading to synthesis of the enzyme can be regulated - gene expression, mRNA processing and stability, mRNA translation.
Suppose 5.0 g of salicylic acid is heated with an excess amount of acetic acid. What is the expected yield of acetylsalicylic acid?
This reaction will not proceed, as the equilibrium is far to the left. In order to synthesize acetylsalicylic acid, one must use acetic anhydrate, and the reaction forms acetic acid instead of water.
