Thursday, December 16, 2010

Digesting Chemistry

What exactly do we put into our mouths, day after day? Just check this list below to find out what we digest every day!
  1. Tropicana Orange Juice: Calcium Hydroxide - CaOH
  2. Minute Maid One Hundred Percent Juice Fruit Punch: Potassium Phosphate - K3PO4
  3. Orville Redenbacher's Popcorn: Calcium Phosphate - Ca3(PO4)2
  4. Orville Redenbacher's Popcorn: Potassium Chloride - KCl
  5. ProPlan Small Dog Biscuit: Zinc Sulfate - ZnSO4
  6. Premium Saltine Crackers: Calcium Carbonate - Ca2CO3
  7. Premium Saltine Crackers: Potassium Carbonate - K2CO3
  8. Crest Whitening Dental Wraps: Hydrogen Peroxide - H2O2
  9. Crest Whitening Toothpaste: Sodium Fluoride - NaF
  10. Clabber Girl Baking Powder: Sodium Aluminum Sulfate - NaAl(SO4)2
  11. Safeway Disinfecting Wipes: Ammonium Chloride - NHCl4
  12. Medical Scrub: Ammonium Sulfate - (NH)2SO4
  13. Kraft Marcaroni and Cheese Dinner: Sodium Phosphate - Na3PO4
  14. Crystal Light Iced Tea Mix: Magnesium Oxide - MgO
  15. Coca Cola: Phosphoric Acid - H3PO4
  16. Advil: Potassium - K
  17. Kraft Easy Mac original: Potassium Chloride - KCl
  18. Walgreens Brand Epsom Salt: Magnesium Sulfate - MgSO4
  19. Salt: Sodium Chlorite - NaCl
  20. Benadryl: Zinc Acetate - Zn(C2H3O2)2
There you have it, folks! A brief run through!

Friday, November 12, 2010

#23 on Exam Review Packet

Explain the difference between Celsius and Kelvin temperature scales. Give examples of the conversions, and explain how you would know whether a given temperature could exist or not.

The Celsius temperature scale is based off of the freezing point of water (0*). Kelvin is based off of absolute zero, or the lowest temperature that is attainable. To convert from Celsius to Kelvin, you add 273.15. Kelvin does not use a degree sign.

Freezing Point of Water: 0*C or 273.15
Boiling Point of Water: 100*C or 373.15

It is easy to tell wether or not a temperature can exist. If it falls below 0 on the Kelvin scale, it can not be possible! This is because 0 is the lowest temperature attainable. So if it falls below -273.15*C, it doesn't exist!

Thursday, October 7, 2010

Chapter 4

I researched the discovery of the neutron!
Please check out my Prezi!
While you're at it, look at this YouTube video.

Works Cited:
"Chadwick's Experiment to Discover the Neutrons." Major and Minor Worlds. N.p.,
n.d. Web. 3 Oct. 2010.
aexp.html>.

"James Chadwick." The History of Computing Project. N.p., 21 Mar. 2010. Web. 3
Oct. 2010. .

Trinh, Hoc. "James Chadwick and His Discovery of the Neutron." Helium. N.p.,
n.d. Web. 3 Oct. 2010.
216709-james-chadwick-and-his-discovery-of-the-neutron>.

"James Chadwick - Biography". Nobelprize.org. 8 Oct 2010

Crowell, Benjamin. "The Discovery of the Neutron." Lectures in Physics. N.p.,
n.d. Web. 31 Mar. 2006. .

Sunday, September 12, 2010

Chapter 2

I am slightly Mysophobic, aka. Germaphobic. So I thought it was fitting that my first Chemistry blog post would be about the physical and chemical properties of Purell hand sanitizer.
Tada! The magical substance that kills germs!

Physical Properties
  • At room temperature, the hand sanitizer is a liquid.
  • It has a high viscosity- meaning that it is a “thick” liquid (water is a "thin" liquid because it can move very fast).
  • Purell Hand Sanitizer is transparent in color.
  • Has a smell like alcohol, because alcohol is one of the main ingredients.
  • Alcohol freezes at -144* Celsius (compared to the 0* Celsius of water).
Although it is a liquid, it is thick enough that it doesn't always take the shape of it's container. You can see that it has a transparent color because the plate is blue, and the liquid looks blue too.


video


See how high the viscosity is? It takes forever for the hand sanitizer to move a little!

Chemical Properties
  • When I added water with the hand sanitizer, it looks like nothing happens. After a little while, the hand sanitizer will start breaking up and dissolving. This is because hand sanitizer is a liquid, not a solid.
Before:
After:
  • When I soaked a penny in hand sanitizer after a period, the penny became cleaner and shiner. The amount of alcohol in the hand sanitizer must be high enough to get rid of dirt and grime. An effective way to clean coins!
Before:
After:
  • Reading the drug facts on the back of the hand sanitizer, it warns that it is flammable. I was able to find an interesting video of a group of students lighting hand sanitizer.
(That I am not in.)
  • It is NOT sensitive to light. I have had hand sanitizer sitting on the kitchen island for months, and it has not changed color.
Day One:
Day Two:
  • It is extremely toxic (an experiment was not done for this one!) Due to the high alcohol levels in hand sanitizer (~60%), congesting it can be fatal to young children and pets and cause others to become drunk.
It seems that, although hand sanitizer can be very useful it can also be dangerous (flammable, toxic, etc.). I think that this product should not be used with small children, or before meals because of the alcohol levels contained.