what are the possible errors on using the iodic titration for determining ascorbic acid when your result is lower than the rest of the group?
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what are the possible errors on using the iodic titration for determining ascorbic acid when your...
In experiment of determining ascorbic acid concentration by a redox titration with potassium iodate, what can be the factors which influence the results from this titration? Ans what are the limitations of this method of determination of ascorbic acid?
Consider the titration of 0.100 L of 0.200 M ascorbic acid with 0.500 M NaOH. What is the pH at the endpoint of the titration? Enter your answer to two decimal places; for this question we can assume the 5% assumption is valid.
A theoretical question: If you had to perform the ascorbic acid/sodium hydroxide titration without a pH meter, what indicator could be used to detect an endpoint as close as possible to the equivalence point? If you did not have a pH meter reading equipment, how else would you detect equivalence point while performing this titration?
Ascorbic acid (vitamin C, MM 176.124 g/mol)) can be determined using an iodometric back titration. A vitamin C tablet was dissolved in 60 mL of 0.3 M H2S04. To the dissolved tablet, 2 g of KI and 50.00 mL of 0.0105 M KIO3 were added, resulting in the formation of a dark orange solution indicating the presence of 13-. The resulting solution was titrated with 0.0685 M S2032- until the starch indicator turned purple. If the end point was observed...
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)...
A selection of commercial fruit juices and fruit extracts were analysed for ascorbic acid content. A student took kiwifruit juice to analyse. This juice is reputed to have ascorbic acid concentrations about 3 times greater than that of orange juice. The student diluted the juice by taking a 25.00 mL sample to a final volume of 100.0 mL. The student analysed 25.00 mL aliquots of the diluted juice solution for ascorbic acid by titration using a standardised iodine solution. Data:...
Using your average titre, you will determine the moles of ascorbic acid present in the sample that you titrated. If a 10.00 mL sample of a solution required 12.75 mL of 0.001273 M KIO3 to reach the visual endpoint how many moles of ascorbic acid were in the sample? Give your answer in mol to six decimal places. Do NOT include units in your answer.
Determination of Vitamin C Concentration by Redox Titration An alternative titration method for determining the concentration of vitamin C in a sample is to use an iodine solution. In this reaction iodine oxidizes the ascorbic acid to C&H&O 2. A 20.00 ml sample of a 1.00 mg/mL vitamin C solution is placed in a flask along with 1 mL of a 1% starch solution to serve as an indicator. A dilute solution of iodine is placed in a buret. A...
When 100mL of 0.0125 M ascorbic acid is titrated with 0.010 M NaOH, how many equivalence points will the titration curve have, and what pH indicator(s) could be used? Please show process and explanation. Thank you!
Enzymatic browning experiment: What happens when an already brown potato is treated with ascorbic acid?