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19 Cards in this Set
- Front
- Back
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process by which one or more substances are changed into one or more
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Chemical reaction
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a. shows what ∆’s take place
b. shows relative amts of various elements and compounds that take part in these ∆’s |
what a chemical reaction equation shows
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starting substances
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reactants
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substances which are
formed |
products
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letters in parentheses indicate___
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physical state (indicated by)
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gas
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(g)
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solid
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(s)
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crystalline solid
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(c)
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aqueous - solid substance in
a water solution |
(aq)s
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liquid
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(l)
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yields
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------>
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catalyst (speeds up reaction)
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Pt
--------> |
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heat is added
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∆
-------> |
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reaction can be reversed
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⇌
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1. Determine exactly what the reactants and products are.
2. Assemble the parts of the chemical equation 3. Balance the equation |
3 steps of balancing an equation
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reactant side
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item on left side
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product side
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item on right side
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a. energy is a reactant
b. energy is absorbed and the reaction feels cold |
endothermic reactions
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a. energy is a product
b. energy is given off and the reaction feels hot |
exothermic reactions
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