What is the molar relationship between ascorbic acid and iodine solution?
  This is an iodine clock reaction, which means two colorless solutions are mixed, the products react and turn a purple-black color. In this reaction, iodide anions (-) are mixed with hydrogen cations (+) and hydrogen peroxide (H2O2) are combined to produce iodine (I2) and water. The iodine then reacts with liquid starch solution to turn a purple-black color. Please note that I made a mistake towards the end of the video when I said ‘tri-iodide’ rather than iodine, but I meant iodine (I2). And …
