NYS Diffusion Lab

Front

Osmosis

Back

the diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration

Front

What was most likely added to this slide?

Back

Salt Water

Front

Why did the water leave the onion cell when salt was added?

Back

The salt created a lower concentration of water around the cells, so the water diffused out of the cells.

Front

Why does distilled water have the opposite effect of salt water?

Back

Distilled water is a higher concentration of water and salt water tends to have a lower concentration of water- water diffuses from H to L

Front

What is the initial color of starch indicator solution?

Back

amber

Front

Another name for starch indicator solution is

Back

Iodine

Front

What is the color of glucose indicator alone?

Back

blue

Front

Which indicator will change color in the presence of glucose sugar solution?

Back

Glucose indicator/Benedict's solution

Front

When iodine/starch indicator solution comes in contact with starch, which color change results?

Back

amber to blue-black

Front

When glucose indicator/Benedict's solution comes in contact with glucose and is heated, the color change goes from

Back

blue to green/yellow/orange