Ascorbic acid (Vitamin C, MW = 176.126g/mol) is a reducing agent, reacting as follows:  C6H8O6 → C6H6O6 + 2H+ + 2e  It can be determined by oxidation with a standard solution of I2. A 200.0-mL sample of a citrus fruit  drink is acidified, and 10.00mL of 0.0500 M I2 is added. After the reaction is complete the excess I2 is titrated with 38.62 mL of 0.0120 M Na2S2O3 . Calculate the number of milligrams of ascorbic acid  per milliliter of fruit drink. I2 +2e → 2I-   I2 + 2Na2S2O3 → 2NaI + Na2S4O6

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Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.