Osmosis Lab Report

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Ahmed Salem
17/1/2011
Section 3
The process of Natural Importance
Introduction
Osmosis is when a fluid passes threw a semi permeable membrane. Moving from an area in which a solute such as salt is present in low concentrations to an area in which the solute is present in high concentrations. There are three types of osmosis: hypertonic is when there is high concentration and the cell has no water inside it (shrunk), hypotonic is when there is low concentration and the cell has swelled up or in other words has a lot of water inside it, isotonic is when the water comes in and out of the cell and stays the same shape. All the carrots we put in the salt solution was from the same carrot, the 0% carrots mass was 6.8grams, the 5% salt solution is 14.6 grams, the 10% salt solution is 6.3grams and the 15% salt solution is 6.8 grams. My hypothesis was that the carrot would shrink and be very small and gooey, but it was wrong.

The controlled variable in this lab is the carrot and time, the manipulated variable is the salt solution, and the resulting variable in this lab is what happens to the carrot. Materials and Methods:

. Salt solution ( 0-15%)
. 4 Carrot pieces from same Carrot( Cut carrot in half if needed) . 4 Beakers
. Water
. Triple beam balance
First of all you need to have water with salt, 4 beakers with the solution inside, you also need to find out the weight of the carrot when you put it on the triple beam balance, After that you need to put the carrot in the beaker for 30minutes, then take it out of the beaker and find out its final mass when you re put it on the triple balance beam thing. Qualitative

The results for the osmosis lab is that the 0% salt solution with the carrot inside mass increased a lot. Making it the most changed mass carrot in all of the solutions. The 5% salt solution carrot mass also increased quite a bit but not that much, this is low concentration or hypotonic in other words.

The 10% salt solution also...
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