3 Properties of Acids:
-Sour
-Corrosive to metal and skin
-Turns blue litmus paper red
3 Properties of Bases:
-Bitter
-Slippery/soapy
-Turns red litmus paper blue
2 Uses of Acids:
-Car batteries (sulfuric acid)
-Soft drinks (phosphoric acid)
2 Uses of Bases:
-Soap (sodium hydroxide)
-Bleach (calcium hydroxide)
Sources:
-http://virtual.yosemite.cc.ca.us/lmaki/Chem142/chap_outlines/chapter12.htm
-http://www.prlog.org/10207697-numerous-uses-of-acids.html
Tuesday, June 12, 2012
Sunday, March 18, 2012
What is a Mole?
Moles are simply another unit of measurement, like a meter, or a foot, or a dozen. A mole is defined as 6.02 X 10^23 of that particular item. You can have a mole of apples, a mole of grains of sand, whatever you want, but moles are usually used to measure atoms. The weight for a single mole of atoms is listed below each element on the Periodic Table, typically called by the name of "Atomic Weight".
A mole is also referred to as Avogadro's number, named after the Italian physics professor who discovered moles, Amadeo Avogadro. Avogadro theorized that equal volumes of different gases at equal temperatures contained an equal amount of atoms. His theory would later go on to be proved, and the estimated number of atoms in that measurement of gas would be thereon called Avogadro's number, known to us today as a mole.
Moles are highly important today in chemistry. They allow us to easily abbreviate large quantities of atoms without having to write out the entire number. A drop of water the size of the period at the end of this sentence contains approximately 10 trillion molecules; however, it is much simpler to use moles to communicate these numbers rather than continuously speaking in trillions and trillions of molecules.
Sources
-http://scidiv.bellevuecollege.edu/bg/moles.html
-http://www.visionlearning.com/library/module_viewer.php?mid=53
A mole is also referred to as Avogadro's number, named after the Italian physics professor who discovered moles, Amadeo Avogadro. Avogadro theorized that equal volumes of different gases at equal temperatures contained an equal amount of atoms. His theory would later go on to be proved, and the estimated number of atoms in that measurement of gas would be thereon called Avogadro's number, known to us today as a mole.
Moles are highly important today in chemistry. They allow us to easily abbreviate large quantities of atoms without having to write out the entire number. A drop of water the size of the period at the end of this sentence contains approximately 10 trillion molecules; however, it is much simpler to use moles to communicate these numbers rather than continuously speaking in trillions and trillions of molecules.
Sources
-http://scidiv.bellevuecollege.edu/bg/moles.html
-http://www.visionlearning.com/library/module_viewer.php?mid=53
Thursday, February 2, 2012
Biogeochemical Cycles
http://www.sciencedaily.com/releases/2009/08/090804071400.htm
All natural cycles coexist with each other in the world. In other words, they are "coupled". One cannot exist with out another. For example, the nitrogen cycle cannot exist without the carbon cycle. No cycle, even cycles of trace elements such as iron, can exist in isolation. It is important to study said cycles as coupled. The reason for that is it makes more practical sense to have an understanding of the cycles in the state they occur naturally, as "coupled". It may be great to know them in isolation, but that lends us no help. Each cycle behaves differently when coupled, and something that may affect a different cycle may indirectly affect another cycle with which it is coupled with. So things that we may not expect to affect the water cycle, may actually affect the water cycle, because it'll be coupled with the carbon cycle for example, and something may affect the carbon cycle, thus indirectly affecting the water cycle.
All natural cycles coexist with each other in the world. In other words, they are "coupled". One cannot exist with out another. For example, the nitrogen cycle cannot exist without the carbon cycle. No cycle, even cycles of trace elements such as iron, can exist in isolation. It is important to study said cycles as coupled. The reason for that is it makes more practical sense to have an understanding of the cycles in the state they occur naturally, as "coupled". It may be great to know them in isolation, but that lends us no help. Each cycle behaves differently when coupled, and something that may affect a different cycle may indirectly affect another cycle with which it is coupled with. So things that we may not expect to affect the water cycle, may actually affect the water cycle, because it'll be coupled with the carbon cycle for example, and something may affect the carbon cycle, thus indirectly affecting the water cycle.
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