The IB Lab Report
My experiment is about osmosis on a potato and if or the quantity of salt affects osmosis. I would do the experiment with 5 potatoes cut into squares all the potatoes weight the same so the weight can`t be a variable the I put the potatoes on 5 different plastic cups with different amounts of salt and then I weight them again to see if the quantity of salt affected the osmosis of potatoes
1a. Research question
¿Does the quantity of salt in water affected osmosis?
|Variables |Control of the variables |
|Independent variable |My independent …show more content…
|quantity of salt that I put on every cup. |
|Dependent variable |I dint leave my potatoes 24 hours like |I leave them the longer time I could (22 hours)|
| |I should | |
|Controlled variables |The kind of potato |I use the same potato for the 5 samples |
| |The salt quantity |I kept these variable under control by |
| | |weighting the glass before and after I put the |
| | |salt |
| …show more content…
-Step 1 I cut the potato into smaller squares and weight each one.
-Step 2 I weight the 5 cups only the cups on the balance.
-Step 3 I put 100 ml of water on each cup.
-Step 4 I measure the quantity of salt that I put on each cup.
-Step 5 Finally I Put the potatoes on the cups to wait and see.
-Step 1 I take out the potatoes samples
-Step 2 I weight all the potatoes samples
-Step 3 I record the data
4. Safety issues
There are not safety issues to considerate on this lab.
5. Raw data
These is the graph before the 22 hours pass
| |Sample1 |Sapmle2 |Sample 3 |Sample 4 |Sapmle5 |
|Water |100ml |100ml |100ml |100ml |100ml |
|Salt |5g |9.1g |2.1g |1.3g |0 g (no salt) |
|Weight of the potato |4.5g |4.5g |4.5g |4.5g |4.5g |