GJ

John Kalimtzis September and Greg Kahanec 21, 2011


 * 1) Description of original sample of water and of the sample after each step of purification
 * 2) Identification of impurity removed with each step of purification
 * 3) Discussion as to the efficiency of each step of purification (refer to both observations and calculations)

1. The physical property of the original sample of water was greenish and yellowish. The water is heterogeneous to begin with but after the end of this step is becomes the chemical properties such as flammability we partially know about. We knew that oil would burn but we didn't know the other things would burn because we had no idea what was in the bottle. It also it had dirt in it, and 2 layers of liquids one being oil and the other being water, which shows that oil is less dense then water. Next step we took out the oil and when we took out the oil the color changed. We saw the greenish yellowish color became darker in a way. Also there was a physical change such no more oil and dirt specs were gone too. Next, we did sand filtration and there was a physical change such as color change. This time we saw the color become brighter and lost the greenish color. The liquid turned into a transparent yellowish color now. Next, we added charcoal and it turned pitch black. The yellowish color was lost and the liquid turned into pitch black and couldn’t see anything except the charcoal mixed with the water. Lastly, after the filtration of the charcoal the water level dropped and became colorless. The green and yellow colors disappeared and the physical appearance looks purified.

2. The water remains homogenous becomes their is only one liquid inside. The physical Properties are described further down and their are no changes in the chemical properties that we know have changed other then what we know won't happen. Like the fact that the water will not rust, or burn. When we removed the oil from the liquid the oil was gone and it became a little more pure. We then sand filtrated it and that got rid of the greenish color. Then becoming only a yellow color. Next, we added charcoal, that didn’t necessarily purify nor remove much from the water but make it black. We then filtrated the charcoal mixed with the water, and what came out was nothing but clean, purified water. The charcoal was removed from the liquid in this step and purified the water from any other liquids.

3. The more we took out of the liquid to purify it, the water level dropped down. So after we took out the oil, the water mL went down by about 10mL. Taking out the oil is good because it becomes purified a little bit more. Next, we did the sand filtrated the water; the sand and rocks sucked some water up from it, taking away a greenish color. Now the water level went down by about 5mL this time. Then we added charcoal to the water and the water level did not change. We then filtrated the water out of the mixed water and charcoal, which helped the water get rid of the yellow color and other bacteria. The water dropped by about 35 mL and is now purified and is now completely clean and the charcoal removed all remaining solutions from the water.