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DECANTATION, OXIDATION AND FILTRATION
DECANTATION
Materials: Water, oil test tube and beaker
Hypothesis: We think all of the water is going to fall first than the oil, because the oil is denser.
Explanation of the experiment: In this experiment we put water (20ml) and oil(20ml) in total 40 ml, in a beaker and then in a hopper we dropped them and closed like the cap so no water or oil filtrates to the test tube. After this, we opened the cap and put another cap in the top of the hopper. Then, all the water started falling and then, when all the water was already on the other side, we closed the cap.
Procedure: First, in a beaker we put 20ml of water and 20ml of oil and we mixed them until we could. Then we dropped them into a hopper and then water started falling, and when all of the water was already on the other side, we closed the cap (as we told you above).
Conclusions: 1. We were right, all of thew water filled first because its less dense than the oil.
2. We thought the oil and the water will mix easily but it turns out water and oil can't.
3. We learnt that water and oil can't mix and that oil its denser than water
Oxidation
Materials: 2 bolts, and 1 apple sliced in half
Hypothesis: The apple that is outside receiving oxygen is going to oxidate while the one that's inside the bag won't
Explanation of the experiment: In this experiment, we cut an apple in half and one slice of the apple we left it outside receiving oxygen and the other slice, inside a bag with no oxygen.
Description of both apples: It had white color, good smell like soap, and the texture is rough and wet. After the oxidation: Color more black, it wasn't wet anymore, it had a gross aspect.
BOLTS
How did we recognized between the oxidate one and the good shape one? Well, the one that was in good shape had a silver color, and the texture was soft. The one that was oxidate had different color, some pieces of the bolt were falling down, and the texture was rough.
FILTRATION
Materials: Sand, beaker, mixer
Hypothesis: We think the water is going to filtrate with the sand
Explanation of the experiment: In this experiment we mixed 2 grams of and with 40 ml of water, and then in a hopper we put it to see filtration. At the end, all of the water came clean and the sand stayed at the bottom
Procedure: First, in a beaker we put 40 ml of water, and then we added 2 gr of sand. After this, we started mixing both until it was completely mixed. Then, in like a hopper, we spilled the water and the sand to see how it will fall to the cup. At the end, only the water passed through and the sand stayed at the bottom
Conclusions: We were wrong, the sand did not pass only the water. This can be a new way of having potable water, in the future. If we put more sand, maybe the water will not have come out as clean as it did.
