12. (a) Write the structure of Vitamin C (ascorbic acid). [1] (b) Show the structure of...
please help with parts "e" and "f"
(e) Show how this specie formed reacts with a free radical R. [1] -OH -OH НОО VO +R-H om onttr (d) What two products are formed as a result? [1+1] -OH nog. Charge ? codical Sequestered) & hybrid is super stable, o so doesn't react further. ascorbyl radical ? or dehydroascorbate . (e) Show (with the help of a chemical equation) why the radical chain reaction does not proceed any further? [1] (1)...
Government and industry analysts routinely measure the quantity of ascorbic acid (vitamin C, C6H8O6) in commercial products such as fruit juices and vitamin tablets. The ascorbic acid reacts with excess iodine, and the amount of I2 remaining is determined with sodium thiosulfate (Na2S2O3). It is suspected by the Montreal Fraud Division that a prominent natural foods importer is defrauding his customers by claiming that his vitamin C tablets contain 45% of the active ingredient ascorbic acid. In one analysis, a...
2. Vitamin C is ascorbic acid. Yet, in the structure given in the Background, one does not see a -COOH group. Instead, one sees a lactone in the structure. Circle the lactone. Explain from what functional groups it is formed, and how it is formed.
2) Refer to the following information for parts a-c: Ascorbic acid, commonly known as Vitamin C, is an essential nutrient involved in tw o and the production of neurotransmitters. Diets deficient in Vitamin C can lead to a condition called survy Combustion analysis of a 12.50 g sample of ascorbic acid produces 18.74 g of Co, and 5.11 H.O. The molecular mass of ascorbic acid is 1 76.12 g/ mol a. Determine the empirical formula for ascorbic acid: b. Determine...
16 7-2 Titration Calculations Ascorbic acid (vitamin C) reacts with according to the equation Starch is used as an indicator in the reaction. The end point is marked by the appearance of a deep blue starch-iodine complex when the first fraction of a drop of unreacted remains in the solution. TI (a) Stundurdization: If 29.41 mL of iodine solution is required to react with 0.197 0 g of pure ascorbic acid, what is the molarity of the iodine solution?! (b)...
Question 7 (1 point) Vitamin C is a more common name for ascorbic acid (Ka - 8.0 x 10-5). Calculate the pH of a 0.034 M solution of vitamin C. 04.10 8.43 O 5.57 O 11.22 2.78
Ascorbic acid or Vitamin C is a simple compound with the following chemical formula C6H8O6. Besides being an acid, it is also a reducing agent. One method for determining the amount of vitamin C in a sample is to titrate it with a solution of bromine, Br2, a good oxidizing agent based on the following chemical equation: Br2 (aq) + C6H8O6 (aq) --> 2HBr (aq) + C6H6O6 (aq) Suppose a 1.00-g “chewable” vitamin C tablet requires 27.85 mL of 0.102 M...
Ascorbic acid or Vitamin C is a simple compound with the following chemical formula C6H8O6. Besides being an acid, it is also a reducing agent. One method for determining the amount of vitamin C in a sample is to titrate it with a solution of bromine, Br2, a good oxidizing agent based on the following chemical equation: Br2 (aq) + C6H3O6 (aq) → 2HBr (aq) + C6H6O6 (aq) Suppose a 1.00-g “chewable” vitamin C tablet requires 27.85 mL of 0.102...
Ascorbic acid (vitamin C, C,H,O) is a diprotic acid (K, - 79 x 10-5,K , = 16 x 10-12). Calculate the pH of a solution that contains 8.7 mg acid per mL water. (Assume that only the first ionization is important in determining pH.) pH =
Vitamin C in a titration with potassium iodate
References Mailings Review View AaBbcode Abccdee AaBbcc No Spacing Heading 1 Normal 3. A suitable method for the determination of vitamin C (C.H.O.) is a titration with potassium iodate (KIO). Potassium iodate is used as a titrant and is added to an ascorbic acid solution that contains strong acid and potassium iodide (KI). Potassium iodate reacts with excess potassium iodide, liberating molecular iodine (12): [1] KIO, + 5KI + 6H 31, +6K...