The change in color of the iodine-starch solution demonstrated that vitamin C was present and if the color of the iodine-starch solution remained the same color, it displayed that vitamin C was not present in the specific fruit juice. Free radicals are made when your body breaks down food or when you are exposed to tobacco smoke or radiation. You'll get almost 55 milligrams of vitamin C from 8 ounces of sweetened tangerine juice. Bad Question Can I use a different part? If you have specific questions about your science fair project or science fair, our team of volunteer scientists can help. You should get results that are within about 0.
One drop can be enough to drive the reaction to completion if it were near completion before. Vitamin C is also involved in protein metabolism. Don't forget about vegetable juices when heading down the juice isle. In some fruits, the amount of vitamin C varies between different varieties of the same species. For any other use, please contact Science Buddies. There are quite a few , most of which have a high sugar content. So you can see, it is very good if we consume vitamin C from fresh fruit, eaten just like that or make fresh orange of yourself.
Diluted frozen orange juice from concentrate has a little less -- about 95 milligrams per 8-ounce glass. You can use typical weights of the fruit or vegetable to calculate how much total vitamin C there is in each fruit or vegetable you test. If the fruit juice has a strong colour that will interfere with determining the end point, dilute the juice before testing. Wait for the color to disappear. Read the level from the bottom of the meniscus, which is the curved surface of the liquid. Stir the liquid in the beaker using a stirring rod Some of the grindings will not dissolve but this is not a problem, because all of the vitamin C will be dissolved.
In this chemistry science project, you will investigate which type of orange juice has more vitamin C ascorbic acid : homemade fresh-squeezed, premium not-from-concentrate, or orange juice made from frozen concentrate. I used a medicne dropeer and counted the number of drops of different fruit juices put in 5 test tubes of iodine starch solution. Vitamin C is good for your health. You'll need 35 milligrams above your daily recommendation if you smoke. The chemical change that occurred within this experiment displayed if vitamin C was present or not.
That means a continuous supply of vitamin is needed in daily diet. The results obtained from this experiment demonstrates that the lower the amount of drops of juice put in to the iodine starch solution, the higher the amount of Vitamin C present. Compared to all the other averages the orange juice was the smallest amount. It is always good to know what fruit is the highest in Vitamin C, which are commonly found in the fruit isle in grocery stores. The exact position is not important, as long as the fluid level is not past the graduated markings on the top of the buret. Can you explain your results? A lack of vitamin C in our bodies causes scurvy, a disease that causes teeth and bone abnormalities. This creates a powerful vitamin C rich tonic that may help to reduce the severity of symptoms associated with the common cold.
Since my control experiment and actual experiment with the fruit drinks had the same outcome it leads me to believe that my results were correct. Other than that, the objective is to identify which fruit juices has higher vitamin C content and the lowest vitamin C content. It is also important to be able to accurately measure the amounts of solutions being used each time using appropriate apparatus. For more information on how to properly use a balance and different titration techniques see. Which area of the world has the best oranges for orange juice? Including these fruits in your diet is a good idea because eating them helps to increase your overall intake. Your classroom organisation may depend on the equipment you have available. It' s rare to be seriously deficient in vitamin C, although evidence suggests that many people may have low levels of vitamin C.
Place equal amounts of the iodine solution in plastic cups. Also different brands of the same kind of juice to see if Vitamin C quantities are similar. Retrieved July 18, 2007, from More advanced students should do background research on stoichiometry and oxidation-reduction redox reactions. Then place equal amounts of the iodine solution in plastic cups. Leave the Erlenmeyer flask there.
High vitamin C foods include guavas, bell peppers, kiwifruit, strawberries, oranges, papayas, broccoli, tomatoes, kale, and snow peas. The blue-black color is the endpoint of the titration. Try one of our science activities for quick, anytime science explorations. After that, fill the other 25 test tubes with 40 drops each of Vitamin C indicator solution. The end point is a pink color that persists for 10 seconds or more. This can be anywhere from 0. It increases the absorption of iron from non-animal foods such as spinach and also plays a role in the storage of iron in major organs e.
Citrus fruits are near the top of the list for vitamin C-rich foods. How do you know when the iodine-ascorbic acid reaction is complete? The science project calls for using this type of starch because it is much easier to make the starch solution. Cooking is one of the main actions that can reduce the. Diabetes also can benefit from extra vitamin C. Test your solution by mixing one drop of the starch solution with one drop of the iodine solution on a piece of wax paper; if your starch solution is well-made, the resulting mixture should be a dark blue-black color.
Nobody said you have to eat them all at once. The results obtained supported and proved my hypothesis correct. When you add a drop of iodine solution, you may see a temporary color change, as shown here the dark blue swirls , that goes away when the iodine solution is mixed in the flask by swirling it. As well, unlike the results when the other three juices were added to the iodine-starch solution, no chemical reaction occurred as Vitamin C is needed for a reaction to occur. You will need to cut each orange in half to use this juicer. As there are pairs of fruit juice solutions being measured it is possible to compare one against the other.