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Introduction To Stoichiometry
What is Stoichiometry?
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Definition: Stoichiometry is the branch of chemistry that deals
with the relationships between the quantities of reactants and
products in a chemical reaction
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Chemical Equations:
o Represent chemical reactions using symbols and formulas
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Moles:
o A mole is a unit used to measure the amount of a substance
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022×10 particles (Avogadro's number)
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Molar Mass:
o The mass of one mole of a substance (in grams)
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4
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Using Mole Ratios:
o Mole ratios come from the coefficients in a balanced
chemical equation
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6
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o Example: If you have 4 moles of H₂, you can produce 4
moles of H₂O using the ratio 2:2
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2
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4
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Convert Given Information to Moles (if necessary)
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Convert Back to Grams (if needed)
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2
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4
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Balanced Equation: 2H2+O2→2H2O
Mole Ratio: 2 moles of H₂ produce 2 moles of H₂O
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Molar Mass of H₂O: 18 g/mol
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Keep track of units (grams, moles)
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