1 / 8

Blue and Gold Demonstration

The Blue and Gold Demonstration illustrates the chemical processes involving reducing agents, specifically sodium dithionite (Na2S2O4), and their effects on the color change of indigo carmine and riboflavin. This experiment depicts successive additions of the reducing agent while stirring in oxygen, revealing the oxidation and reduction reactions over time. Observations include the fluorescence of oxidized riboflavin under ultraviolet light and the changes in color intensity, providing a visual representation of chemical transformations. What questions arise regarding the processes occurring in differing regions?

riva
Télécharger la présentation

Blue and Gold Demonstration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Blue and Gold Demonstration

  2. Blue and Gold Demonstration Addition of Solution X Continued Stirring in Air Addition of Solution X Continued Stirring in Air What questions do you have?

  3. Blue and Gold Demonstration Addition of Na2S2O4 a reducing agent Continued Stirring in O2 Oxidized Indigo Carmine Reduced Indigo Carmine

  4. Blue and Gold Demonstration Addition of Na2S2O4 a reducing agent Continued Stirring in O2 Oxidized Indigo Carmine Reduced Indigo Carmine

  5. Blue and Gold Demonstration Addition of Na2S2O4 a reducing agent Continued Stirring in O2 Oxidized Riboflavin Reduced Riboflavin

  6. Blue and Gold Demonstration Addition of Na2S2O4 a reducing agent Continued Stirring in O2 Oxidized Fiboflavin Reduced Riboflavin

  7. Blue and Gold Demonstration Oxidized riboflavin fluorescence when irradiated with ultraviolet light

  8. Blue and Gold Demonstration The dark line on figure to the left depicts the change in color intensity as a function of added dithionite for both indigo and riboflavin. What is happening chemically in regions labeled A, B, C, and D? Why doesn’t the color change as shown in the diagonal dashed line? A B C D Color ? Continued stirring exposed to air Successive addition of dithionite

More Related