Experimental Eggs

            Our experiment consisted of placing two eggs in different variants of sodas with different acidic values. The goal of said experiment was to observe which soda dissolved an eggshell faster, Coke or Pepsi. We put 120mL of each liquid in into 140mL beakers and timed the results. A timer was set up in order to record exact time; but, it reached its maximum limit once the 48 hour mark was reached. After seven days the results were concluded; nothing happened to the eggshells. Over a period of seven days the only thing to happen was a thin, filmy substance appearing on the top of both liquids; the film was thicker on the Coke.

­Lab Design Sheet - Noah Bell, Garrett Boyce

Name of Experiment: Magical Disappearing Eggshell                                

Question to be answered:      

Which soda dissolves the eggshell faster?                            

Prior Knowledge:

Eggs are Hard Boiled.

Hypothesis:Prediction (If …we do X…then…Y will happen…)

If we put the eggs in coke or pepsi, then the coke will dissolve the shell faster.

Hypothesis:Rationale (…because…)

Because the coke has a higher acidic content.

Independent (Manipulated) variable/cause (what will you determine?):

The brand of soda

Dependent (Responding) variable / effect (what will you find out?):

The time it takes for the eggshell to dissolve.

Constants (what will you keep the same?):

Amount of soda, size of egg

Equipment:

140 mL of Coke and Pepsi

2 Hard boiled eggs

2 140 mL beakers

Procedure:

1. Pour sodas into beakers

2. Place eggs in beakers with soda carefully

3. Wait and time results

DATA:

Time(hours)	Amount of eggshell dissolved(%)
24	0
48	0
72	0
96	0
120	0
144	0

ANALYSIS: (Summarize what happened; staple graphs, etc. to this sheet)

The soda had almost no effect on the eggs. If there was any change, it could not be seen with the human eye.

CONCLUSION: (What is the scientific explanation for these results?  Use relevant vocabulary terms.)

During the course of our experiment, we found that soda will not have a dissolving effect on eggshells. Given more time, the soda may have had more effect. We believe that the reason no effect had occurred was because the sodas did not have a high enough acidic content to erode the eggshell.