Determination of the vitamin C content of a commercial vitamin C tablet and compare the result with the value specified by the manufacturer.

IMMNAUEL LUTHERAN COLLEGE S6 Chemistry Name: Hramar ( 7 ) Experiment 7 : summary of commercial vitamin C anovulant Title: goal of the vitamin C theme (ascorbic panelling) of a commercial vitamin C tablet and compare the result with the mensurate specified by the manufacturer. hypothesis : In this experimentation, we have to determine the vitamin C content of a commercial vitamin C tablet which is the mass of ascorbic cutting in the tablet. As one is a weak oxidizing divisor use mainly for the determination of strong reducing agents, ascorbic acid C6H8O6 (aq) push be rapidly and quantitatively oxidized by whizz in acidic condition as shown in the amour equation: I2(aq) + C6H8O6 (aq) ? C6H6O6 (aq) + 2H+ (aq) + 2I- (aq) This manner involves the direct titration of the ascorbic acid with a criterion one solution in an acidic medium. However, atomic number 53 is non very soluble in water (0.001M), this makes th e method slight than ideal.

Instead of dissolving solid iodine in water, we seat obtain overplus quantity of iodine solution by adding an unmeasured excess of potassium iodide solution to a cut volume of an acidified standard potassium iodate solution according to the quest equation: IO3-(aq) + 5 I- (aq) + 6 H+ (aq) 3I2 (aq) + 3H2O (l) Then the experiment is right away followed by a back titration of the excess liberated iodine with standard sodium thiosulphate solution as shown below: I2 (aq) + 2S2O32- (aq) ? 2I- (aq) + S4O62- (aq) With iodine solution, the thiosulphate ion is oxidized quantita tively to tetrathionate ion. The amount of ! iodine solution produced utilize this method can then be calculated. The above method have to be repeated for devil clippings. The first fourth dimension with out the ascorbic acid, but the second time with. By finding out the amount of... If you want to engender a full essay, coordinate it on our website: OrderCustomPaper.com

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