Chem.ch.7

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Author:
Anonymous
ID:
110258
Filename:
Chem.ch.7
Updated:
2011-10-19 14:33:09
Tags:
Chemical Reactions
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Description:
Chemical Reactions
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  1. Define chemical reactions.
    • the transformation of one or more
    • substances into different substances. Ex: color changes in a shirt because of
    • the sun, or heating to a spoon.
  2. Define Evolution reactions.
    • reactions that occur in liquids and form a
    • gas.
  3. Define combustion reactions
    • substance reacts w/ oxygen, emitting heat and
    • forming one or more oxygen-containing compounds. Subcategory of
    • oxidation-reduction.
  4. Define oxidation reduction.
    • electrons are transferred from one
    • substance to another.

    • Ex: formation of rust and the dulling of
    • automobile paint
  5. Define precipitation reaction.
    forms solid substances in water.
  6. Define gas evolution reaction.
    The formation of a gas is evidence of a chemical reaction.
  7. Define balanced equation.
    • one in which the #s of each type of atom on
    • both sides of the equation are equal. (insert coefficients, not subscripts)
  8. Define the abbreviations: s, l, g, --->, +, (5)
    • s: solid
    • l: liquid
    • g: gas
    • --> "reacts to form"
    • +: and

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