Chapter 11

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evidence of chemical reactions

atoms of 1 or more substances are rearranged to form different substances
evidence of chemical change
- temp change, color change, gas bubbles, precipitate-solid resulting from 2 clear liquids
- -law of conservation-matter is neither created nor destroyed (matter is conserved during a reaction)
word equations

written out instructions of an equation
skeleton equations

uses chemical formulas to identify reactants and products
chemical equations

must show how law of conservation of matter is obeyed
# atoms of reactants=?

# atoms of products
coefficient
- number written in front of a reactant or product.
- -describes the lowest whole ration of amounts of all reactants and products
synthesis reaction

also called composition reactions; 2 elements or simple compounds combine to form new compounds; generally compounds produced are larger or more complex than the reactants
combustion reactions

normally involve a substance reacting rapidly with oxygen gas, releasing heat and light
decomposition

a single compound breaks down into 2 or more elements or less complex compounds; most are endothermic.
metallic chlorates

break down to metal chloride and oxygen gas
carbonates

break down to metal oxide and carbon dioxide
metallic hydroxides

break down to metal oxide and water
certain acids

weak acids break down to non-metal oxide and water
certain metal oxides

metal oxide breaks down to metal and oxygen
electrolysis of molten salts

breaks down to the basic elements

Author

Mkuenle

77368

Card Set

Chapter 11

Description

Chemical Reactions

Updated

2011-04-04T22:26:46Z

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