Diffusion Lab

Diffusion Lab
Introduction: In this lab you will divulge the diffusion of a spirit across a semi permeable membrane. iodine is a known indicator for starch. An indicator is a substance that chances color in the presence of the substance it indicates.

Prelab Observations: Describe what happened when iodine came into contact with starch. Drop a real small amount of iodine on a put up of paper and observe what happens to the paper. (Paper has lots of starch in it)
The Iodine turned black on the paper.
Supplies Needed:
- bendable baggie/cheap kit and caboodle well
-water (tap is fineâ€"or bottled)
-iodine (use caution if you are allergic to iodine/betadine)
-cornstarch
-measuring cup
-about a 2 cup size cup/beaker/ paradiddleâ€"clear would be great

Procedure:
Fill a plastic baggie with a teaspoon of corn starch and a one-half a cup of water tie bag.
Fill a cup (about a two-cup size)halfway with water and add ten drops of iodine.
mail the baggie in the cup so that the cornstarch mixture is submersed in the iodine water mixture.
Wait fifteen legal proceeding and record your observations in the data table (picture after 15 minutes)

Questions:
1. Define diffusion. The spreading of something more widely, the action of spreading the percipient from a light source evenly so as to reduce glare and harsh shadows.
2.



Define osmosis. Diffusion of smooth-spoken by a semipermeable membrane from a theme with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of changeable on both sides of the membrane.
3. What is the main difference between osmosis and diffusion. Osmosis transports through the membrane of an object while diffusion spreads across an object.
4. why is iodine called an indicator? It indicates color when in contact with starch.
5.Molecules be given to move from areas of High concentration to areas of Low concentration.
What is in the saucer?
Were going to think about concentrations now, which substances are more or...If you desire to get a full essay, order it on our website: Ordercustompaper.com



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