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What happened next? In our diffusion lab, we placed a bag containing starch inside a beaker with water and iodine.





A. The water in the beaker turned purple.
B. The water in the beaker evaporated.
C. The starch in the bag turned purple.

This question is part of Unit 3: The Cell--The cell membrane, diffusion, & osmosis
Asked by Kath, Last updated: Feb 20, 2020

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Carice Snow

I am a well trend Motivational speaker at California.

Carice Snow, Motivator, MA, California

Answered Jun 13, 2019

The correct answer to this question is C. The starch in the bag turned purple. This experiment is performed to help one understand the process of diffusion, as well as Semi-permeable membrane and Concentration gradient. It is the process of molecules and atoms moving from an area with high concentration to low concentration.

Diffusion occurs in physics. To perform this experiment, one would need a paper clip, dialyzes tubing, beakers, scissors, starch, and iodine. The starch turns purple due to the diffusion of the iodine that occurred when it was in the tube. The iodine was at a high concentration.

 

John Smith

John Smith

Answered Feb 04, 2017

The starch in the bag turned purple.
 

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