Briana,Joye+and+Ashley

__**introduction:**__ We found dissolved oxygen to be most interesting. We were curious on seeing which would have the most dissolved oxygen out of the water we see mostly everyday so we came up with.. __**Key question:**__ Which has more dissolved oxygen: sink water (tap water), swam water or bottled water ? __**Hypothesis:**__ We thought that bottled water has more dissolved oxygen because bottled water is more fresh/clean. Tap water has alot of sewage involvement that can affect the amount of dissolved oxygen. Swamp water has alot of tree's and other things living inside the water which take up alot of dissolved oxygen.

__**Material:**__ Manganous Sulfate, Alkaline Potassium Iodine Azide, Sodium Thiosulfate, Starch Indicator Solution, SulfuricAcid 1:1, water sampling bottle, titrator and titrator tube __**Procedure:**__ (see paper) UEI Water Quality Studies: Dissolved Oxygen Lab Instructions
 * Always remember to wear goggles and gloves.**

__**Data:**__ Dissolved Oxygen (DO) swamp water: DO.. 10 ppm sink water (tap water): DO.. 13.5 ppm bottled water: DO.. 18.25 ppm

__**Results:**__ We found out that bottled water had the highest amount of dissolved oxygen.  __**Conclusion:**__ In conclusion our hypothesis was right, bottled water has more dissolved oxygen than both swamp water and sink water.

__**Acknowlwdgements:**__ We would like to thank Mr. Trossello for letting us use his dissolved oxygen kit. Also thank a subsitute teacher who told us alittle about oxygen and helping us to think of a question and come up with the idea of what to test. Thank you all :).