Osmosis: Hot Water
biology sbi4uo-a | Osmosis and Diffusion Lab | By: Elora Hobbin | | Group Members : Ashley Riley-Roy and Adam Reynolds | 9/11/2012 |
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Introduction:
Osmosis and diffusion are two procedures that are critical for cell survival. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. Osmosis is the movement of water molecules across a cell’s membrane. These two procedures help a cell to survive because they help maintain homestasis. (Diffusion) Homestasis is the steady or balanced state of a cell. (Diffusion) Therefore it is important to find what conditions will make these procedures occur to their greatest abilities. There are many variables in nature including temperature, concentration levels, volume and time. In the following report 2 temperatures we examined along with 2 different concentration levels. There includes a hot, 60 degrees, and cold, 5 degrees, temperature and an undiluted and diluted solution for both. The two constant variables in this experiment were the volume, 250 mL of water, and the time, 40 minutes, checking every 10 minutes. This experiment was performed to determine the optimal conditions for when osmosis and diffusion occur.
Hypothesis:
Part A: The potassium permanganate will diffusion more evenly in hot water compared to the cold water because water molecules move faster when they are hotter.
Part B: The “sausage” with the greatest change because of osmosis will be tube C which is undiluted corn syrup in a hot water bath. The reason for this is because the concentration gradient between the substance in the “sausage” and the water is the greatest and molecules move faster when the temperature is hotter.
Materials:
Distilled water - cold (5 degrees) - hot (60 degrees) crushed ice 30mL diluted corn syrup
2x Petri dish 30mL undiluted corn syrup
String thermometer
100mL graduated cylinder hot plate
Potassium permanganate glass funnels
4x 15
|
Introduction:
Osmosis and diffusion are two procedures that are critical for cell survival. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. Osmosis is the movement of water molecules across a cell’s membrane. These two procedures help a cell to survive because they help maintain homestasis. (Diffusion) Homestasis is the steady or balanced state of a cell. (Diffusion) Therefore it is important to find what conditions will make these procedures occur to their greatest abilities. There are many variables in nature including temperature, concentration levels, volume and time. In the following report 2 temperatures we examined along with 2 different concentration levels. There includes a hot, 60 degrees, and cold, 5 degrees, temperature and an undiluted and diluted solution for both. The two constant variables in this experiment were the volume, 250 mL of water, and the time, 40 minutes, checking every 10 minutes. This experiment was performed to determine the optimal conditions for when osmosis and diffusion occur.
Hypothesis:
Part A: The potassium permanganate will diffusion more evenly in hot water compared to the cold water because water molecules move faster when they are hotter.
Part B: The “sausage” with the greatest change because of osmosis will be tube C which is undiluted corn syrup in a hot water bath. The reason for this is because the concentration gradient between the substance in the “sausage” and the water is the greatest and molecules move faster when the temperature is hotter.
Materials:
Distilled water - cold (5 degrees) - hot (60 degrees) crushed ice 30mL diluted corn syrup
2x Petri dish 30mL undiluted corn syrup
String thermometer
100mL graduated cylinder hot plate
Potassium permanganate glass funnels
4x 15