I. Title of experiment: Determination of Vitamin C in Tablets and Juices. 2. Introduction: Ascorbic acid or vitamin C is the analyte of this test. It is the most suitable vitamin used to treat colds. It acts being a natural antihistamine that reduces the severity of cool symptoms and it is also used for allergy control. It is an antioxidant and makes head lines when it comes to cancers prevention. Besides, it helps to avoid cataracts, center diseases and regulate blood sugar levels.

III. Purpose:

1-To practice redox titration.

2-To decide the amount of nutritional C present in vitamin C tablet. IV. Equippments, tools, chemical reagent:

-starch remedy 0. 2%

-potassium iodate KIO3

-potassium iodide KI

-sulfuric acid H2SO4 0. 6 M

-sodium carbonate Na2 CO3

-vitamin C tablet

-sodium thiosulfate Na2S203

-analytical balance

-10 cubic centimeters and twenty-five ml pipettes equipped with pipette bulb

- burette

-distilled normal water

-- dropper

-- 250 ml Erlenmeyer

-500ml volumetric flask

- graduated cylinder

-beakers

V. Trial and error procedure:

Reference point experiment amount 7, lab manual phar 205, 2012 p. sixty-five.

VI. Theory:

Rather than titrating directly with iodine, too much iodine will probably be generated directly in the option with ascorbic acid based on the following formula: IO3- + 5I- +6H+ → 3I2 + 3H2O Vitamin C is conveniently oxidized with I2 in acidic medium. Ascorbic chemical p + supplement C → dehydroxyascorbic acid + 2H+ +2I- A back titration is performed seeing that standard remedy lacks steadiness. Excess I2 that would not react with ascorbic acid is then again titrated with standard sodium thiosulfate solution which is a good reducing agent. 2 ...

Tags:

Essay on Sudan 1

Essay regarding Guidelines for Termination of Business. Pdf format