Presentation on theme: "By B.J. Hanson Mr. leingang class 1rst period Science fair project."— Presentation transcript:
1By B.J. Hanson Mr. leingang class 1rst period Science fair project. What is more corrosive?By B.J. HansonMr. leingang class 1rst periodScience fair project.
2QuestionWhich common household liquid is the most corrosive?
3HypothesisIf you put a piece of a hamburger in different liquids, then the coke will dissolve the patty the most, because it is used as a cleaning agent.
4VariablesMv: solution (coke, vinegar, bleach, water, salt water, sugar water)Cv: amount of liquid(2 cups, 1 tablespoon of salt/sugar if sugar/salt water), time in liquid (1 week), time of observation (8:30)Rv: amount of hamburger dissolved, or change in meat/liquid
5Materials• 6 see through cups (or jars) • vinegar • bleach • sugar water (one tablespoon of sugar) • salt water (one tablespoon of salt) • 1 hamburger patty cut into 6 equal pieces •cola (not diet coke)
7Procedure1: Setup see diagram. 2: Wait 1 week: record observations of what is left of the hamburger/how it or the water has changed every day 3: Clean up.
8Data table Liquid days Cola Bleach Vinegar Water Sugar water Salt water1Partly dissolvedSomewhat bubblyExpandedWhiteYellow waterCloudy, no change in meatCloudy,Slightly yellow water2More has dissolvedAbsurdly bubblyVery expanded,White, andStringyOrange water,Very slightly dissolvedVery cloudy, meat almost completely unchangedCloudy, more yellowwater3Almost all goneNo changeTop half of water somewhat orangeOrange4Completely dissolved5Mold6mold7
9Conclusionin conclusion, the coke dissolves the hamburger the most. We can prove this because the coke dissolved it COMPLETELY while only the WATER dissolved it a little! That is conclusive data. This supports my original hypothesis. Therefore if you put a piece of hamburger in different liquids then the coke will dissolve them the most.
10Background information Bleach has a ph value ofVinegar has a ph value of 2.4Water and sugar/salt water all have a ph value of 7Coke has a ph value of 2.5A Lower ph means more acidicThe Lowest natural ph value ever is -3.6A Higher ph means more basicPhosphoric acid is included in coke but not other sodasPhosphoric acid has a ph value of 1.8Caffeine has a ph value of 2. 5