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Catalyst

Catalyst. Get calculators and notebooks today! 1. Calculate the molar mass of CaCl 2 2. Convert 54g of CaCl 2 to moles of CaCl 2. 3. How many grams of CaCl 2 do you have if you have 3 moles of CaCl 2 ?. Cash Points, 4 th Period. 4 th Period Avg : 75 Chemistry Avg : 76.

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Catalyst

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  1. Catalyst Get calculators and notebooks today! 1. Calculate the molar mass of CaCl2 2. Convert 54g of CaCl2 to moles of CaCl2. 3. How many grams of CaCl2 do you have if you have 3 moles of CaCl2?

  2. Cash Points, 4th Period 4th Period Avg: 75 Chemistry Avg: 76

  3. Cash Points, 5th Period 5th Period Avg: 76 Chemistry Avg: 76

  4. Cash Points, 6th Period 6th Period Avg: 85 Chemistry Avg: 76

  5. Cash Points, 7th Period 7th Period Avg: 71 Chemistry Avg: 76

  6. Today’s Agenda

  7. BIG GOAL! Stoichiometry is a lot of little pieces Important to keep big picture in mind

  8. Grams Substance A Molar Mass Moles Substance A Moles Substance B Grams Substance B The Mole to Mole Ratio! Mole Ratio Molar Mass Today we’re tackling the middle piece – which means we need to learn a new conversion factor! Remember what a mole is? http://www.youtube.com/watch?v=1R7NiIum2TI

  9. Coefficients Coefficients indicate the number of moles of a compound. So when I see 3 CO2, that means I have three moles of CO2. If I see just H2O, remember that I assume the number one if there is no coefficient.

  10. Grams Substance A Molar Mass Moles Substance A Moles Substance B Grams Substance B Mole Ratio Molar Mass The mole to mole ratio is used to go from moles of one substance (A) to moles of another (B). A mole to mole ratio is the ratio of the moles of one reactant or product to the moles of another reactant or product in a balanced equation.

  11. Mole to Mole Ratio Example The coefficients represent the number of moles. 2 graham crackers + 1 marshmallow + 4 bars of chocolate 1s’more

  12. 2 graham crackers + 1 marshmallow + 4 bars of chocolate 1s’more To write a mole to mole ratio, set the number of moles of the first compound equal to the number of moles of the second compound. “What is the mole to mole ratio of graham crackers to s’mores?” 2 graham crackers = 1 s’more

  13. GUIDED PRACTICE! 2 KClO3 2 KCl + 3 O2 According to this equation, what is the mole to mole ratio of KClO3 to O2? According to this equation, what is the mole to mole ratio of KCl to O2? According to this equation, what is the mole to mole ratio of KClO3 to KCl?

  14. EXAMPLE 2 KClO3 2 KCl + 3 O2 1. How many moles of KCl can you get if you have 5 moles of KClO3? 2. How many moles of O2 would be produced with 15 moles of KClO3? • What are we given? What do we want? What is the conversion factor? • Set up your t-chart to work it out!

  15. Today’s Agenda

  16. Mole to Mole Practice Mg + O2 2MgO 1. According to this equation, what is the mole to mole ratio of Mg to MgO? 2. According to this equation, what is the mole to mole ratio of O2 to MgO? 3. How many moles of Mg would you need to form 10 moles of MgO? 4. How many moles of O2 are needed to combine with 40 moles of Mg? 5. How many moles of MgO could be created with 30 moles of Mg?

  17. Today’s Agenda

  18. Exit Slip CH4+ 2 O2 CO2+ 2 H2O 1. How many moles of CH4 would you need to form 12 moles of H2O? 2. How many moles of O2 are needed to combine with 16 moles of CH4?

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