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STOICHIOMETRY

STOICHIOMETRY. Peanut Butter and Jelly!. Same thing with chemical reactions. Key Points:. Need a balanced equation Compare materials using coefficients (mole ratio) Any material can be compared to any other material in the equation (using moles) … some materials will be ignored.

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STOICHIOMETRY

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  1. STOICHIOMETRY

  2. Peanut Butter and Jelly!

  3. Same thing with chemical reactions

  4. Key Points: • Need a balanced equation • Compare materials using coefficients (mole ratio) • Any material can be compared to any other material in the equation (using moles) … some materials will be ignored.

  5. Ca + KCl  K + CaCl2 • What do we need to do first? • How many moles of KCl are required to react with 1 mole of Ca? • How many moles of KCl are required to react with 5 moles of Ca? • If I react 6 moles of calcium with 12 moles of potassium chloride, how many moles of potassium are produced?

  6. Problem … • I can’t measure out “moles” • I can measure “grams” • Need to use Molar Mass from the Periodic Table to convert between grams and moles

  7. NaF + CaBr2 CaF2 + NaBr • How many grams of CaBr2 are required to completely react with 275 grams of NaF?

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