the effect of acid on tooth decay by ernest rutherford and marie curie
TRANSCRIPT
![Page 1: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/1.jpg)
The effect of acid on The effect of acid on
tooth decaytooth decay By Ernest Rutherford and Marie Curie
![Page 2: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/2.jpg)
PurposePurpose The purpose of this experiment is to The purpose of this experiment is to
determine the effect of different determine the effect of different concentrations of vinegar on the concentrations of vinegar on the mass lost in human teeth.mass lost in human teeth.
![Page 3: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/3.jpg)
Materials and MethodsMaterials and Methods
3 styrofoam cups3 styrofoam cups waterwater 3 human teeth3 human teeth vinegarvinegar digital scaledigital scale
![Page 4: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/4.jpg)
ResultsResults
Time (hours) Mass of tooth in water (g)
Mass of tooth in ½ water and ½ vinegar (g)
Mass of tooth in vinegar (g)
0 0.538 0.519 0.442
2 0.531 0.511 0.410
5 0.529 0.499 0.391
12 0.529 0.570 0.359
24 0.522 0.422 0.324
Table 1. Mass of teeth in different concentrations of vinegar over 24 hours.
![Page 5: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/5.jpg)
ResultsResults
Time (hours) Total mass percentage lost in water (%)
Total mass percentage lost in ½ vinegar ½ water (%)
Total mass percentage lost in vinegar (%)
24 3 14 31
Table 2. Percentage of tooth mass lost after a 24 hr period in different concentrations of vinegar.
![Page 6: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/6.jpg)
Qualitative ObservationsQualitative Observations
Vinegar
- Tooth Decay
- Shriveled
- Yellow
- Cracked
Water
- Normal colour
- Smooth
- No damage
½ Vinegar ½ Water
- Bright White
- Shriveled
- Bumpy
- Chipped
![Page 7: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/7.jpg)
Research SourcesResearch Sources
http://www.britannica.com/EBchecked/topic/3235/acetic-acid-CH3COOH - William H. Brown (Proffessor in Chemistry, Beloit College)
http://www.mayoclinic.org/diseases-conditions/cavities/basics/causes/con-20030076 - Roger W. Harms M.D. (Director of Mayo Clinic)
![Page 8: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/8.jpg)
Explanation of ResultsExplanation of Results
Independent variable – What is vinegar?Independent variable – What is vinegar?
Acetic acidAcetic acid
moleculemoleculeWaterWater
moleculemolecule
![Page 9: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/9.jpg)
Explanation of ResultsExplanation of Results
Ca5(PO4)3OH(s) + H+(aq) → Ca5(PO4)3+(aq) + H2O(ℓ)
HydroxylapatiteHydroxylapatite
![Page 10: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/10.jpg)
ImplicationsImplications
ACID
![Page 11: The effect of acid on tooth decay By Ernest Rutherford and Marie Curie](https://reader036.vdocument.in/reader036/viewer/2022062422/56649f1e5503460f94c3677d/html5/thumbnails/11.jpg)
Thank You!Thank You!