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Stoichiometry

Stoichiometry. Calculating quantities in chemical reactions. Stoichiometry. 1 frame and 3 wheels are needed to create one tricycle. If I use 1 dozen frames , how many tricycles can I make?. 1 dozen. If I use 1 dozen wheels, how many tricycles can I make?. 4 or (1/3 dozen).

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Stoichiometry

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  1. Stoichiometry Calculating quantities in chemical reactions.

  2. Stoichiometry 1 frame and 3 wheels are needed to create one tricycle If I use 1 dozen frames , how many tricycles can I make? 1 dozen If I use 1 dozen wheels, how many tricycles can I make? 4 or (1/3 dozen)

  3. Stoichiometry 2AgNO3 + H2S Ag2S + 2HNO3 2 moles of silver nitrate yields 1 mole of silver sulfide Conversion Factor: 2 mole AgNO3 = 1 mole Ag2S And 1 mole H2S yields 2 moles HNO3

  4. 2AgNO3 + H2S Ag2S + 2HNO3 ? moles 3.5 mol How many moles of Ag2S will be produced from 3.5 moles of AgNO3 ? 3.5 mole AgNO3 x 1 mole Ag2S= 1.75 mole Ag2S 2 mole AgNO3 How many grams of Ag2S will be produced from 3.5 moles of AgNO3? 1.75 mole Ag2S x 247.8g = 433.65g Ag2S 1 mole

  5. Tell-tale sign of stoichiometry Given information about one substance, and being asked about a different substance.

  6. Stoichiometry • A balanced chemical equation tells the mole/mole ratio between different compounds in the equation. mole X gmole Y grams grams

  7. Practice problem What mass of Mg(OH)2 will react with 1.20g of HCl? Mg(OH)2 + 2HCl g MgCl2 + 2H2O 1.20g HCl x 1 mol HCl = .0329mol HCl 36.5g .0329mol HCl x 1 mol Mg(OH)2 = .0164 mol Mg(OH)2 2 mol HCl .0164 mol Mg(OH)2 x 58.3g = .956 g Mg(OH)2 1 mol

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