Calcium
and Tin
Abstract:
Part 1: Out of the two elements and compounds, Calcium Hydride would be the worst in water and the biggest pollutant.
Part 2:
Calcium and Magnesium
Handbook of Chemistry and Physics
http://members.rediff.com/fmc/calcite_ncc.htm
www.webelements.com
http://www.property.oregonstate.edu
http://www.epa.gov/epaoswer/hazwaste/test/pdfs/9001.pdf
http://who.int/water_sanitation_health/GDWQ/Chemicals?tinful.htm
http://www.keelingwalker.co.uk/tin_oxide_products.htm
www.wavecrestdiscoveries.com/water.htm
Part 3: Which elements was the greatest threat for each of the 7 characteristics?
Calcium Hydride is the element that is the greatest threat in carcinogenic and corrosive. Calcium is the most soluble and abundant. Tin has the lowest melting point. Calcium Hydride has the most uses.
Part 4: I believe Calcium Hydride is the biggest threat out of the compounds. Scientist are not sure if its a carcinogenic and how toxic it is. It is also corrosive so it can hurt if gotten in water.
Introduction:
Part 1: Definitions-
Solubility: capable of being dissolved in or as if a liquid.
Melting Point: a point to which something melts
Toxicity: of, or relating to, or caused by poison or toxin
Common Uses: the mostly used ways
Carcinogenic: an agent causing or inciting cancer
Corrosive: to wear or be worn away
Abundant: more than needed
Part 2:
Tin:
Silvery-white metal, malleable, and slightly ductile.
Calcium:
A metallic element, fifth in abundance. Calcium is not found alone in the Earth’s crust.
Part 3: Water is used for everything. If Calcium Hydride got in the water then it could kill plants, corrode appliances (such as dishwashers, washing machines, etc,.). Since scientist are not sure if its cancerous, it can cause cancer to you or pets. Just a little Calcium Hydride in water means its useless and deadly.
Part 4: The reason Calcium Hydride is the worst is it has the ability o corrode and might have the ability to cause cancer (carcinogenic). Since its a calcium compound, it will dissolve in water and contaminate it.
Results:
Part 1:
|
Chemicals |
Calcium (Ca) |
CaCO2 |
CaH2 |
Tin (Sn) |
SnS |
SnO |
Worst |
|
Solubility |
D** |
Very |
Very |
I*** |
I |
I |
Ca |
|
Melting point |
842oC* |
1339oC |
816°C (under hydrogen gas) |
232oC |
880oC |
1080oC (D) |
Sn |
|
Common uses |
Vitamins |
Used in paints, plastic, and rubber. |
Drying agent, reducing agent, source of hydrogen. |
Plating, Cans, and as an alloy. |
Catalyst |
Glazes, ceramic colors, and polishing agent. |
X |
|
Carcinogenic |
No |
No |
? |
No |
No |
No |
CaH2 |
|
Corrosive |
No |
No |
Yes |
No |
No |
No |
CaH2 |
|
Abundant |
Very |
Very |
High |
Rare |
Rare |
Rare |
Ca\ CaCo2 |
*Means Celsius **D=Decomposes in water.
I***=Insoluble in water. ?****=Scientist are not sure.
Part 2:
Discussion/Conclusion:
Part 1: Calcium decomposes when it hit water, it melts at 842o Celsius, its not corrosive or a carcinogenic, very abundant, and mostly used in vitamins. Calcium Carbonate is very soluble, it melts at 1339o Celsius, is used in paints, plastic, and rubber, its not corrosive or a carcinogenic, and very abundant. Calcium Hydride is very soluble, is melted 816° Celsius when using Hydrogen gas, used as a drying agent, reducing agent, and a source of Hydrogen, its corrosive, and high in abundance. Scientist are not sure if its a carcinogenic. Tin is insoluble in water, and has a low melting point of 232o, its used for plating, cans, and as an alloy, its not corrosive and not a carcinogenic, and is rare. Tin Sulfate is insoluble, has a melting point of 880o Celsius, and used as a catalyst, not a carcinogenic or corrosive, and is rare. Tin Oxide is insoluble, decomposes at 1080o Celsius, used in glazes, ceramic colors, and as a polishing agent, not corrosive and not a carcinogenic, and rare.
Part 2: Calcium hydride is the biggest threat because its very soluble, is melted 816° Celsius when using Hydrogen gas, used as a drying agent, reducing agent, and a source of Hydrogen, its corrosive, and high in abundance.
