solution was decolourised. 5. The volume of the ascorbic acid used to decolourised the DCPIPsolution was recorded. 6. Step 2 to 5 was repeated twice to obtain the average volume of thr ascorbic acid solution used. Part B: Determination of the concentration of vitamin C in pineapple juice 1. A 1.00cm3 syringe was used to transfer 1.00cm3of DCPIP solution into a small test tube. 2. A 5.00cm3 of syringe was filled up with 5.00cm3 of pineapple juice. 3. The needle of the 5.00cm3 was
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Vitamins Vitamin is defined as any of a group of organic substances essential in small quantities to normal metabolism‚ found in minute amounts in natural foodstuffs or sometimes produced synthetically (Dictionary.com‚ 2012). We need vitamins and minerals for our bodies to function properly. By eating a variety of foods‚ we can often supply our bodies with the necessary vitamins it needs‚ but in some cases it is necessary to take a vitamin supplement as well. By eating a good diet in conjunction
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Biology SL Internal Assessment What is the effect of heat on vitamin C concentrated in lemon juice? Introduction: “Vitamins are complex organic substances that are needed in very small amounts for many of the essential processes carried out in the body.” 1It is estimated and supported scientifically that only a few mg are filling the daily recommendation‚ which is essential for a healthy living. As most of vitamins cannot be produced by our bodies‚ we need to obtain them from
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of Vitamin C by Titration The objective of this experiment is to use a redox reaction titration to accurately determine the amount of vitamin C in a sample of lemon juice‚ orange juice‚ or grapefruit juice. Chemistry of Vitamin C The chemical name for vitamin C is L-ascorbic acid. Its molecular formula is C6H8O6; its molar mass is 176.12 g/mole. Ascorbic acid is found throughout the plant and animal kingdoms‚ occurring in citrus fruits‚ hip berries (such as rose hips)‚ fresh tea
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Title: Quantitative analysis of vitamin C contained in ribena Aim: to determine the amount of Vitamin C in a sample of ribena Materials: * Vitamin C (ascorbic acid‚ C6H8O6) * 4% potassium iodide (KI) * 1M acetic acid (CH3COOH) * N-bromosuccinimide (NBS‚ C4H4BrNO2) Apparatus: * Conical flask * 100 ml volumetric flask * Weighing bottle * Analytical weight balance * Spatula * Funnel Results: Item: | Mass in grams | Mass of weighing bottle with ascorbic
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Lab 2: Spectrophotometric Determination of Iron In Vitamin Tablets Objectives: - To determine the amount of iron in a generic vitamin tablet on a per tablet (in grams) basis. - To prepare standards using a pre-made iron solution to help determine the iron content in our generic vitamin tablets - Determine absorbances of our vitamin tablets and standards using the spectrophotometer Method: 1. Mass three vitamin tablets that contain iron 2. Place each vitamin in a 125-mL Erlenmeyer flask
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to the other metal‚ where they will again receive electrons and plate that metal. Lemon Cell While there are many electrolytes which will cause this reaction‚ citric acid is frequently used as a demonstration because it occurs naturally in citrus fruits. The two metals often used are zinc‚ as in a galvanized nail‚ for the anode and copper‚ as in a penny‚ for the cathode. A lemon can be used as both the container and the source of citric acid. If a slit is made in one end of the lemon‚ the penny
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In Seth Holmes’ and Tania Li’s compelling books‚ entitled Fresh Fruit‚ Broken Bodies and Land’s End the extreme dynamics between the indigenous communities of the Lauje‚ of Sulawesi Indonesia‚ and of the Triqui‚ of southern Mexico‚ and the global capitalistic market are examined and scrutinized. In the case of Li’s Land’s End she depicts the transformation of traditional agriculturally practices‚ the shift of local economics and the social hierarchy that emerges from the choice of the Lauje people
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Kantipur Fresh Fruits and Juice (KFFJ) is a private organization where customers are the main priority and it focuses on employees and the profit. Its aim is profit and profit maximization‚ survival and growth. KFFJ was started in 2001 in Kathmandu and now has become a market Leader in Nepal and is on the rise for providing high-quality fruits and juice to its customer. They have many branches in many locations in Kathmandu and other major cities and are planning to establish partnership with international
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Rick & Rosalinda Puetter—Personal vitamin/supplement use and practice‚ 6 February 2000. Vitamins‚ Supplements & Their Uses I. Introduction Our interest in vitamins‚ dietary supplements‚ and nutritional biochemistry began in 1994. I in particular was a severe skeptic about supplements in general‚ and thought everything one’s body needed could be supplied from a “healthy diet”. This‚ of course‚ is true to some degree. Healthy diets allow one to live a long and pleasant life. This does not mean
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