71 lines
1.5 KiB
Plaintext
71 lines
1.5 KiB
Plaintext
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= Stoichiometry =
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Relationship between the relative quatnties of substances taking part in a
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reaction or fomring a compund typically a ratio of whole integers
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== Moles ==
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Standard unit of quantity of 6.022 * 10^23
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* One mole of any element has a mass in grams equal to its atomic mass
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* Convert from moles to grams by multiplying number of moles by amu of that
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substance
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== Percentage compositon ==
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weight of percent of each of the elements in a formula
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{{{
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(atoms in element) * (atomic weight) / (formula weight of compound) * 100%
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}}}
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== Empirical Formula ==
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Experimentally determinded formulas representing the lowest whole number ratio
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of the elements in the compound
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* C,,6,,H,,6,, => CH
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To find an impirical formula you need
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* Elements in the compound
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* % compostion
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* Periodic table
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== Chemical Equations ==
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Shorthand that describes the chemical transformations of matter using chemical
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formulas.
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* A + B => C + D
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* A + B
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- Reactants (consumed)
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* C + D
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- Products (produced)
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Law of conservation of mass
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* Mass is neither created nor destoryed in chemical reactiosn
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* see [[matter#laws]]
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total number of molecules is always consistent
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== Limiting Reagents ==
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Reagent in a chemical reaction whose quantity limits the amount of product
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formed
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Excess reagent is the opposite
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== Percent Yield ==
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Amount of product formed in a lab reaction expressed as percentage
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Is actual/expected
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== [[solution|Solution]] ==
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see [[solution|Solution]]
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[[index]]
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