Carbon study December 2011 Chemical properties and uses

Necessary materials: Spoon burned Heating source, spirtiera, Tripod and asbestos sieve, coal, Sulphuric acid, nitric acid, water, calcium oxide.

Reaction of carbon with oxygen Conclusion: Carbon combines with oxygen in air to form carbon dioxide.

Preparation of calcium hydroxide.

Carbon dioxide is put out by his property disturbing the lime water. They formed precipitate calcium carbonate.

Carbon reaction with acids: Sulphuric and nitric. Conclusions: Hot carbon reacts with both acids. Carbon dioxide is formed which troubled the lime water. Carbon chemical reactions take place only at high temperatures.

Carbon, both state and form of compounds is very importantly for the fo Carbon, both state and form of compounds is very importantly for Carbon, both state and form of compounds is very importantly for the formation and maintenance of life. Carbon forms a whole circuit in nature known as the carbon cycle. Carbon is the essential element of living matter, the product fuels,coal and oil. the formation and maintenance of life. Carbon forms a wholrcuit in nature known as. Carbon, both state and form of compounds is very importantly for the formation and maintenance of life. Carbon forms a whole circuit in nature known as the carbon cycle. Carbon is the essential element of living matter, the product fuels,coal and oil. IF YOU WANT TO KNOW MORE!

Carbon is widespread in nature both in free state and complexed form. In the free state is found in two crystalline forms: diamond andgraphite and amorphous carbon form.

Characteristics of diamonds. Diamond is the hardest natural substance known. Diamond is composed of carbon atoms just like mine, or graphite.Why is diamond hard and graphite soft? Their hardness variesd ue to the way in which carbon atoms are arranged. Diamond weight is measured in carats. In order to extract a one carat diamond should be screenedhundreds of tons of rock. About diamonds: Due to the exceptional physical properties diamond occupies avery special in the world of precious stones. It is practically the only rock formed exclusively from a singleelement, pure carbon, graphite pencils same carbon or coal, onlythis time the enormous pressure crystallized in a cubic structurewith strong atomic links. Thus diamond, with the largest numberof atoms per unit volume, exhibits two outstanding qualities:Special transparency with irizaţia feature, and extrem e hardness(10 on the Mohs scale), being the hardest mineral. In fact the name of the original stresses this last point, the ancient Greekmeaning Adamas 'invicibil'.

Forme alotropice ale C: Some allotropes of carbon: a) diamond; b) graphite; c) lonsdaleite; d – f) fullerenes (C60, C540, C70); g) amorphous carbon; h) carbon nanotube Forme alotropice ale C: Some allotropes of carbon: a) diamond; b) graphite; c) lonsdaleite; d – f) fullerenes (C60, C540, C70); g) amorphous carbon; h) carbon nanotube Allotropic forms of carbon graphite Graphite is actually carbon, arranged in some small plates that have the property that cliveaza. Graphite Graphite is a mineral spread in nature. Part of non- metals group. Grafitulare chemical formula is pure carbon anddiamond-shaped hexagonal crystallization. Hardness: 1- 2 Mohs,metallic gloss or matte.