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Osmosis in an egg.Investigate how the change of salt solution can affect the mass of an egg.

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Introduction

Osmosis in an egg-Lab 1 Aim: Investigate how the change of salt solution can affect the mass of an egg. Materials: * Beaker * Egg * Measuring cylinder * Spoon * Distilled water * NaCl solution 5% and 10% * Balance * Stopwatch Diagram: Method: 1. When we got into the class, the eggs were already prepared in distilled water. Each group took one egg, washed it, dry it and weigh it. Record the weight of the egg. 2. We introduced the egg into the beaker which contained 5% NaCl and leave it to rest for ten minutes. ...read more.

Middle

1.1 0.22 10 0.4 1 0 1.1 1.5 -3 -4 -0.61 Graph: Conclusion: As a conclusion, our aim was successful; this can be explained by the results shown above. In terms of Osmosis and cell membrane it was proved that different salt solutions can affect the mass of an egg. The shell of the egg was removed because it was thought that the process would faster and efficient. Another reason could be that by removing the shell, the possibility of having errors will be lower. ...read more.

Conclusion

The egg in distilled water or in 0% salt solution will expand more compared to one placed in salt solution. This occurs because the concentration of water in the beaker is greater than the water concentration of the egg. Hypertonic explains when the concentration of solute is greater inside the animal or plant cell than the concentration in the environment. Osmosis causes a net flow of water into the cell, which causes it`s expansion. In my own perspective, the use of eggs as a model for showing osmosis in animal cells is correct, as there`s a possibility of testing how salt solute will pass through the cell membrane. ?? ?? ?? ?? Celina Campo Biology IB ...read more.

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