What is more corrosive?

By B.J. HansonMr. leingang class 1rst period

Science fair project.

Question

Which common household liquid is the most corrosive?

Hypothesis

If 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.

Variables

• Mv: 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

Materials

• 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)

Diagram

coke bleach vinegar waterSugarwater

Saltwater

hamburger

hamburger

hamburger

hamburger

hamburger

hamburger

Procedure

1: Setup see diagram.2: Wait 1 week: record observations of what is left of the hamburger/how it or the water has changed every day3: Clean up.

Data tableLiquiddays

Cola Bleach Vinegar Water Sugar water Salt water

1 Partly dissolved Somewhat bubbly

ExpandedWhite

Yellow water

Cloudy, no change in meat

Cloudy,Slightly yellow water

2 More has dissolved

Absurdly bubbly

Very expanded,White, andStringy

Orange water,Very slightly dissolved

Very cloudy, meat almost completely unchanged

Cloudy, more yellowwater

3 Almost all gone No change No change No change Top half of water somewhat orange

Orangewater

4 Completely dissolved

No change No change No change No change No change

5 Mold No change No change No change No change No change6 Mold No change No change mold mold No change7 mold No change No change mold mold mold

Conclusion

in 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.

Background information• Bleach has a ph value of 12.322• Vinegar has a ph value of 2.4• Water and sugar/salt water all have a ph value of 7• Coke has a ph value of 2.5• A Lower ph means more acidic• The Lowest natural ph value ever is -3.6• A Higher ph means more basic• Phosphoric acid is included in coke but not other sodas• Phosphoric acid has a ph value of 1.8• Caffeine has a ph value of 2. 5