Life sciences
Osmosis
Table of Contents
Introduction 2
What is osmosis? 2
Osmosis in plant cells. 3
Diagrams A, B and C explained. 3
Osmosis in animal cells 4
Diagrams 1, 2 and 3 explained 5
Reverse osmosis 6
Pros and cons of reverse osmosis 6
Factors that affect optimal osmosis 7
The importance of osmosis in industry 7
Questions 8
Hypothesis 8
Aims 8
Variables 8
Controlled variables 8
Components 9
Method followed 9
Potato sizes after experiment 13
Precautions taken 13
Shortcomings 14
Conclusion 14
Effects on the environment 14
Bibliography 15
Plagiarism check 16
Graph 17
Analysis of graph 18
Introduction
In this research assignment I will be talking about osmosis. I will be explaining what osmosis is and what its importance is to the
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There are equal concentrations inside and outside the cell, the solution is isotonic because there are equal amount of water molecules inside and outside the cell. The plant cell is not exactly firm and strong because the vacuole is not full and swollen.
Diagram C: Turgid plant cell.
There are is a high concentration of solute outside the cell than there is inside the cell, and there is a higher concentration of pure water inside the plant cell. The solution is hypotonic because there is more solute concentration on the outside of the cell.
Osmosis in animal cells
In hypotonic solutions, animal cells swell up and explode as they cannot become turgid because animal cells don’t have cell walls that could prevent the cell from bursting. In hypertonic solutions, water molecules diffuse out of the cell because of osmosis, the cell will then shrink. Animal cells will always be surrounded by isotonic solutions. This is to avoid the bursting or shrinking of cells.
Diagrams 1, 2 and 3 explained
Diagram 1: Isotonic
There is no water movement, there is an equal amount of water molecules inside and outside the cell. The cell is
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EACH WAS STIRRED UNTIL SALT HAD DISSOLVED.
8:38
Potato was dropped into each of the glasses, starting with A and ending with E.
8:39
The potato in this glass sunk to the bottom of the glass.
The potato didn’t sink, it was floating and surfaced a little bit. Showing on face of the cube.
The potato didn’t sink, it was floating and surfaced a little bit. Showing only one of the faces of the cube.
The potato did not sink, it was floating and it surfaced a little bit. Showing only one of the faces of the cube.
The potato did not sink, it was floating and it also surfaced but a little bit higher than the others that surfaced.
8:52
No changes.
Sunk to the bottom of the cup, osmosis was clear.
Very slowly sinking to the bottom.
No changes.
No changes.
9:09
No