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100 Days of Science #54-- Fluoride and Calcium Experiment

We have soaked an egg in vinegar before to make a "bouncing" egg like many Pinterest photos show but I was intrigued with the idea of taking the experiment one step further.  

We read that if you coat one egg in a fluoride toothpaste first that the fluoride will protect the shell for the acidic vinegar and keep it from breaking down as fast. 



We thought it sounded like the perfect experiment to try!.  We got out two eggs, two small mason jars (with lids) and a tube of toothpaste. 

First we smeared toothpaste all over one egg and then set it aside to dry on the counter for 24 hours. 




The next morning we rinsed off the toothpaste egg as best we could and with both eggs ready we poured 1/2 cup of vinegar into each mason jar.  We put the lids on and labeled the jar with the toothpaste egg so we'd know which egg was which.


Then we set them on the counter and observed them for the next two days.


We didn't see much difference in our observations at all.

After two days we unscrewed the lids and dumped out the vinegar.


With just a bit of gentle rinsing our non- toothpaste egg looked like this!


At first the boys thought the difference was rather remarkable but I reminded them that we had rinsed off the non- toothpaste egg and to keep our experiment true we had to rinse the toothpaste egg too.


It looked like this when we were done... and honestly if we had kept rinsing we could have washed all the white off I'm sure.  However, it was a bit thicker and seemed to be a bit more resistant to the vinegar.

I thought the results were going to be a bit more dazzling and I began to wonder if we should have used a thicker coat of toothpaste or not washed it off as thoroughly as we did.



Others in this series:
53. Iodine and Starch Experiment
55. Botanical Gardens in Winter
56.  Making Cell Models
57. Which Has More Water; Ice or Snow?
58. Exploding Snow and Water Baggies
59.  Exploring Minerals
60. Visiting the Hartford Science Museum
61-63. 3 STEM Bridge Challenges
64. Making Models of the Earth
65. Plate Techtonics with Graham Crackers
66.  Homemade Lava Lamp
67.  Science Movies We're Watching
68. Index Card Towers
69.  Botany at the Botanical Gardens
70. Best Board Games for Science 
71. Homemade Frozen Yogurt Pops
72.  Starburst Rock Cycle 
73. & 74. Sinking a Marshmallow
75. Jumping Conversation Hearts 
76-78. Building a Paper Airplane 3 Ways 
79. Learning About Hummingbirds 
80.  Planting an Herb Garden 
81. Mushroom Spores 
82. - 84.  Penny Saturation Experiments 
85. Sink or Float?
86. Disappearing Ink 
87. Sedment Layer Jars
88. Tie Dye Science 
89-91. DNA Experiments 
92.  Homemade Butter 
93. Floating Marker Art 
94. & 95. Oil Spills & Water Filtration 
96.- 98. Making Rock Candy & Rock Candy Experiments 
99. Rocket Science 
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Comments

  1. Kari WagnerJanuary 16, 2019 at 8:42 AM

    Thank you for all of these ideas. Keeping science interesting in homeschool has been a challenge. :)

    ReplyDelete
  2. Sparkles and LattesJanuary 16, 2019 at 2:19 PM

    This is so cool and such a fun experiment.

    ReplyDelete
    Replies
    1. Mother of 3January 16, 2019 at 3:14 PM

      It really was neat! I was skeptical that we were going to see any sort of difference but we did.

      Delete
  3. Dee | GrammysGrid.comJanuary 16, 2020 at 4:33 PM

    Interesting result! Thanks so much for linking up with me at my #UnlimitedMonthlyLinkParty 8, this party will be open until January 26. I pinned your post! My themed party 9 for All Things Crochet is open until January 25 if you have any appropriate posts. I would love to have you join me at my short story prompt party February 2 to 9 for fun and creativity. Just start typing and see what you come up with. Remember, no story is too short! The prompt is: The sun was shining brightly but then…

    ReplyDelete
    Replies
    1. Joanne January 16, 2020 at 4:42 PM

      Thanks so much for the pin and for hosting.

      Delete

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