to study the air-water interface. The color stratification may continue to devel

Question

to study the air-water interface. The color stratification may continue to develop over the next 5-10 minutes. What do you observe? If you shake the tube again to make the solution homogeneous, the stratification will redevelop with time What does this color separation demonstrate? There is a reaction in the solution that uses up oxygen, turning the solution yellow, but on the other hand more oxygen is always entering the solution at the air-water interface so the top O, very s how indigo carmine (reduced yellow) indigo carmimeMybe you'll be interes (oxidized blue) ited in howt wor chemically: In the alkaline solution the glucose reduces the indigo carmine to a yellow color and the glucose is oxidized to a carboxylic acid (gluconic acid). If oxygen is present, it re-oxidizes the dye to a blue color pH 128 gluconic acikd glucose but if the oxygen is completely consumed in solution the dye stays yellow Test your understanding of the laboratory What would the colors have looked like in this experiment if you had a little bubble of air stuck at the bottom. of the tube A positive correlation has been noted between the gill surface area in fish species and their need for oxygen (which we may call their "oxygen demand"), Why might gill surface area play a role in the supply of oxygen?t

Explanation / Answer

1]Considering the fact that the air bubble stuck at the bottom of the tube contains some percentage of oxygen,the bottom most part of the tube will develop a stint of blue color due to the oxidation of the dye.If the air bubble is devoid of oxgen then,the bottom would appear yellow.

2]Gills take oxygen out of the water and let water carry away carbon dioxide. Fish force water through their gills, where it flows past lots of tiny blood vessels. Oxygen seeps through the walls of those vessels into the blood, and carbon dioxide seeps out.So larger the surface area of the gills larger is amount of blood vessels and hence more efficient will be the supply of oxygen.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.