Tuesday, November 22, 2011

Science 11/22/2011

EXAMPLES OF CHEMICAL REACTIONS


SYNTHESIS/COMPOSITION                  2H2 + O2 à 2H2O


DECOMPOSITION                           2KClO3 à 2KCl + 3O2


SINGLE REPLACEMENT                  2Al + 3NiBr3 à 2AlBr3 + 3Ni


DOUBLE REPLACEMENT                  AgNO3 + KCl à AgCl + KNO3

VOCABULARY

CHEMICAL FORMULA – a shorthand way to show a compound or molecule

CHEMICAL EQUATION – shorthand description of a chemical reaction

CHEMICAL REACTION – the process of when substances undergo changes to produce new substances

REACTANTS – what you begin with in a chemical reaction

PRODUCTS – what you end with in a chemical reaction

SYNTHESIS/COMPOSITION REACTION – when you begin with two or more simple substance and produce a complex substance

DECOMPOSITION REACTION – when you begin with a complex substance and produce two or more simple substances

SINGLE-REPLACEMENT REACTION – when a single element switches places with an element in a compound

DOUBLE-REPLACEMENT REACTION - when a two elements switch places with each other in a two compounds

IONIC BOND – bonding between a metal and a non-metal when electrons are transferred from the metal to the non-metal

COVALENT BOND – bonding between non-metals when electron pairs are shared






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