Why was there a color change that occurred inside the cell did any starch diffuse out of the cell did any glucose diffuse out of the cell explain how you can tell this?
The starch would not be able to diffuse from the intestine into the blood and from the blood into the cells, Glucose is so small and soluble, so its able to diffuse.
What happens to the water content of the red onion cells when they are placed in a salt solution explain why this happened?
Describe what happens to the water content of the red onion cells when they are placed in a salt solution. The water absorbed the solute (salt), which made the cell shrink. There is less water content in the cell.
Will starch glucose and starch indicator iodine pass through a membrane?
Glucose, starch and iodine (potassium iodide) will readily pass through the membrane of the dialysis tubing.
How can you tell if starch diffuses out of the cell?
I can tell because the solution outside of the “cell” would have turned blue-black if any starch diffused out. This is because there was some solution outside the “cell”, which turns blue-black in · Lugol’s Iodine in the the presence of starch. 4.
How will you know whether starch has diffused across the membrane in part a how will you know whether iodine has diffused across the membrane?
To test whether iodine or starch have crossed the synthetic membrane, you will look for a change in color. A solution of iodine is tan and a solution of starch is clear or milky white; when iodine and starch are together in the same solution, the solution is purple, dark blue or black.
Did all of the molecules diffuse out of the bag into the beaker Why or why not quizlet?
Did all of the molecules diffuse out of the bag into the beaker? No, all the molecules did not diffuse out of the bag into the beaker. Glucose moved out of the dialysis tubing because it was small enough. The starch remained inside of the dialysis tubing because it was too large to pass through.
When the salt solution was added to the onion cells was the concentration of water greater inside or outside of the cell?
When the salt solution was added to the onion cells, was the concentration of water greater inside or outside of the cell? Explain your answer using your observations from this lab. The concentration of water was greater outside of the cell.
What colors would you expect if the experiment started with glucose and I2KI inside the bag and starch in the beaker explain?
What colors would you expect if the experiment started with glucose and I2KI inside the bag and starch in the beaker? The beaker would turn blue.
What is osmosis and diffusion?
In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.