Sources Vitamin C officially known as L-ascorbic acid, its prolonged name being 2-oxo-L-threo-hexono-1,4-lactone-2,3-enediol is an Essential Vitaminfirst structurally identified by Szent-Gyorgyi, Waugh, and King in   and first synthesized by Haworth and Hirst in Average dietary intakes are in the sufficiency range above what the RDA recommends although the lowest groups of vitamin C intake are under the recommendations Particularly rich sources of Vitamin C include:
According to both interpretations of the data obtained by the titration oranges would clearly be most suitable to take because due to their volume-[ascorbic acid]-ratio oranges as well as their fruit juice have the best properties to serve as our vitamin C supply.
That means even if oranges have a greater volume than limes and lemons and therefore occupy more space their ascorbic acid content is also bigger than that of limes and lemons. So that means if we now consider the vitamin C content relative to the volume it turns out that using oranges would be the best fruits to take because their vitamin C concentration mass per unit volume is the highest and therefore we need to take less oranges which outweighs the disadvantage of their big volume.
It also turned out that if we would use the fruit juice of oranges would be the most suitable to take because the smallest volume of juice would be needed to cover the need of ascorbic acid of the sails crew during the journey.
This is the case because we can obtain the greatest volume of juice by juicing an orange and also because again the ascorbic acid concentration is greatest in oranges.
So how can we now decided if taking whole fruits or fruit juice would be the better option? If we would just consider the number of boxes we would have to take to store the needed amount of vitamin c for the journey taking the fruit juice would be the better option since fewer boxes would be needed.
For example could we use simple cartons for the storage of whole fruits while we would have to use impregnated or maybe wooden boxes to store the fruit juice.
Finally, that would mean that those boxes could be heavier and harder to produce than those for whole fruit storage and additionally juicing all those fruits would mean a lot of extra work. Also the juice could easily goo bad and the vitamin c content in the juice would decrease due to oxygen oxidation of ascorbic acid.
So as we see even if we would have to store a slightly smaller number of boxes on the ship if we would take the fruit juice, taking the whole fruits would be the favored option.
In my calculations I did not include the captain of the ship because the assignment was asking for the vitamin c supply for the crew but if I had in included the captain, what means that we would need The number of fruits we would have to take would be slightly different.
However, since the need of vitamin c for one person is not that big, the addition of the captain to my calculations would not have an crucial effect on the result and oranges would still be the best fruit to take. Another human made mistake was that when we prepared the ascorbic acid solution for the standardization of the iodine solution we filled the Erlenmeyer flask up with a bit too much water.
That means the ascorbic acid in the solution was a bit more diluted than it was meant to leading to slightly lower concentration in the ascorbic acid solution than those we used for our calculations. That means if the concentration of vitamin c in the solution titrated with iodine solution the concentration of iodine we calculated might have been inaccurate.
Meaning that, if we would have used a ascorbic acid solution with the correct concentration, we would have needed a slightly higher concentration of iodine to reach the endpoint. When investigating the fruits we did not focus on the varying sizes of fruits, as well as on the thickness of their peel or their eatability.
With that I mean that oranges can be easily pealed and eaten as snack what means it would be easy to use them as vitamin c source. Compared to that limes and lemons are rather hard to eat and we would have to process them otherwise to obtain their vitamin c. So that is another advantage of oranges that would support the decision to use them as vitamin c supply on the journey.
So dependent on the type of orange the peel can be very big and this fact might have a crucial effect on the calculations.
However, since it is very hard to determine a the exact volume we disregarded this fact in our calculations and discussions and just assumed that the thickness of the peel would not alter our final result too much.
The last point I would like to discuss was the coloring of the fruit juice because due to the already colored juice it was hard to exactly determine the endpoint of the titration because neither of us knew how the color change would look like.
That means it could be possible we were overshooting the end point and based on that calculated a slightly different concentration of vitamin c for the fruit juice. However, even if we slightly overshot the end point the concentration of the vitamin c we determined should almost be correct and should not affect our final result in so far that it would lead to another assumption about what fruit would be best to take.
September 14, Paragraph 1, Sentence 1 0 No sentence-level conversations. Paragraph 2 0 No paragraph-level conversations.Redox Titration of Vitamin C Lab Report Pre-Lab Questions 1.
A solution is prepared by dissolving g ascorbic acid C6H8O6 in 1L of water. What is the molarity of the solution? Post-Lab Questions 1.
Write the equation for the best fit line determined in your standardized titrations. Overview Information Vitamin C is a vitamin. Some animals can make their own vitamin C, but people must get this vitamin from food and other sources.
Chemistry 11 Santa Monica College Part III: Name of Sample Used: _____ 1. Briefly describe the sample you chose to examine and how you prepared it for analysis.
Hard Rhino Ascorbic Acid (unflavored) is a pure form powder with no excipients or fillers, available in multiple sizes. The L-enantiomer form of Ascorbic Acid is known as Vitamin C, which is an essential nutrient that must be ingested due to the inability to synthesize ascorbic acid.
High Dose IV Vitamin C (IVC) Making health a journey, not a destination. The primary focus of the Riordan Clinic is on the use of high-dose Intravenous Vitamin C (IVC) to treat a .
Lab 14 - Determination of Amount of Vitamin C in a Commercial Product by Redox Titration Goal and Overview The amount of ascorbic acid (vitamin C) in a commercial product will be determined by using redox titration of vitamin C with 2,6-dichloroindophenol (DCP).