Chem unit 6
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Evidence of a chemical reaction
- temp. change
- color change
- odor, gas and bubbles
describe chemical reaction using chemical equations
reactant + reactant -------- product + product
Law of conservation of mass
- says that matter can not be created or destroyed through a chemical reaction
- Therefore it is fundamental that the equations that represent chemical reactions include sufficient information to show that the reaction obeys the law of conservation of mass.
A + B = AB
- oxygen combines with a substance and releases energy in the form of heat and light
- CH4 + 2O4 =CO2 + 2H2O
AB = A + B
Single replacement reaction:
A + BX = AX + B
double replacement reactions
AX + BY = AY + BX
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