what is the limiting reagent in the preparation of aspirin?
536765
Since the stoichiometry for salicylic acid and acetic anhydride is 1:1, acetic anhydride is in excess and salicylic acid is the limiting reagent.
447787
Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, with a melting point of 136 °C (277 °F), and a boiling point of 140 °C (284 °F). Its acid dissociation constant (pKa) is 3.5 at 25 °C (77 °F).
4761
['Aspirin (Bayer® Aspirin, Ecotrin®, Excedrin®, St. ... ', 'Ibuprofen (Advil®, Motrin®, and others)', 'Ketoprofen (Orudis®)', 'Naproxen (Aleve®)']
1122104
Both Tylenol and aspirin are OTC pain relievers. However, unlike Tylenol, aspirin also has some antiplatelet (blood-clotting) properties. Aspirin blocks the formation of a compound called thromboxane A2 in platelets in the blood.
1027022
['H2SO4 : Sulfuric Acid. CH4 : Methane.', 'C12H22O11 : Sucrose. C3H8 : Propane.', 'NaHCO3 : Baking Soda. F : Fluoride. F2 : Fluoride.', 'H2O2 : Peroxide.', 'C8H10N4O2 : Caffeine.', 'C9H8O4 : Aspirin.', 'Zn(NO3)2 : Zinc. CO : Carbon Monoxide. NaOH : Sodium Hydroxide. ... ', 'CnH2nOn : Sugar.']
716345
Aspirin contains salicylate, which derives from willow bark. Its use was first recorded around 400 BCE, in the time of Hippocrates, when people chewed willow bark to relieve inflammation and fever.
1268233
['Aspirin (available as a single ingredient known by various brand names such as Bayer® or St. Joseph® or combined with other ingredients known by brand names such as Anacin®, Ascriptin®, Bufferin®, or Excedrin®).', 'Ibuprofen (known by brand names such as Motrin® and Advil®).']
386491
['Alcohol Ethoxylate (AE)', 'Alkyl (or Alcohol) Ethoxy Sulphate (AES) and Alkyl Sulphate (AS)', 'Amine Oxide.', 'Carboxymethyl Cellulose (CMC)', 'Citric Acid.', 'Cyclodextrin.', 'Diethyl Ester Dimethyl Ammonium Chloride (DEEDMAC)', 'Ethanol.']
830305
It comes from Spiraea, a biological genus of shrubs that includes natural sources of the drug's key ingredient: salicylic acid. This acid, resembling what's in modern-day aspirin, can be found in jasmine, beans, peas, clover and certain grasses and trees.
195690
limiting reactant. reactant that is completely consumed in a chemical reaction and limits the amount of product. Excessive Reactant. reactant that occurs in a quantity greater than required. theoretical yield.
879248
Aspirin and salicylic acid are poorly soluble in cold water. ... Therefore, a mixed solvent recrystallization technique is used where ethanol is the primary solvent and water is the secondary solvent. Use of this system makes the bulk of salicylic acid remain in solution but permits aspirin to crystallize.
389993
The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. ... Another way is to calculate the grams of products produced from the given quantities of reactants; the reactant that produces the smallest amount of product is the limiting reagent (approach 2).
1455586
['N-Acetyl-Carnosine (NAC) 1.0% (approved by IVP)', 'Glycerin (lubricant) 1.0%', 'Carboxymethylcellulose sodium (lubricant) 0.3%']
361093
A limiting reagent is a chemical reactant that limits the amount of product that is formed. The limiting reagent gives the smallest yield of product calculated from the reagents (reactants) available. This smallest yield of product is called the theoretical yield.
365326
Re: Limiting Reactants & Limiting Reagents There is a subtle difference. A reactant is a directly reacting substance present at the initiation of the reaction whereas a reagent is a substance participating in a chemical reaction.
855391
Physical properties Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, with a melting point of 136 °C (277 °F), and a boiling point of 140 °C (284 °F). Its acid dissociation constant (pKa) is 3.5 at 25 °C (77 °F).
79094
What is the difference between this aspirin and human aspirin? Human aspirin is sold in dosages of 81 milligrams, 325 milligrams, and 500 milligrams. Aspirin made for dogs comes in 120 milligrams is sometimes flavored with beef or liver. Always speak to your veterinarian before feeding any aspirin to your dog.