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9/26/11

71. Balancing Equations Activity. 72. Balancing Equations Activity. 9/26/11. 10/22/2013. 10/22/2013. A pplication: Balancing Act Ws Turn in when complete Connection: How is balancing equations like something you have done in math? Exit:

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9/26/11

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  1. 71 Balancing Equations Activity 72 Balancing Equations Activity . 9/26/11 10/22/2013 10/22/2013 • Application: • Balancing Act Ws • Turn in when complete • Connection: • How is balancing equations like something you have done in math? • Exit: • 2 H + CO3 → H2O +2CO2 Draw out this equation in your journal. Draw the atoms. Is this balanced or unbalanced? What does this have to do with the conversation of mass? . . Starter: Arrange molecules into an equation: 2 Ag, 2 AgCl, 2 Cl, Practice: Glue Balancing Act Practice here

  2. October 22, 2013AGENDA8.5 F.I will be able to recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass by reading, and writing while completing notes and activity. 1 Starter 2. Notes 3. Activity 4. Exit

  3. Table of Contents Date Lecture/ Activity/ Lab Page 9/25 Metal, Nonmetals, and Metalloids 41-42 9/26 Where’s Al? 43-44 9/27 Element Wanted Poster 45-46 9/30 Bohr Model Challenge 47-48 10/1 Periodic Table Notes/Puzzles 49-50 10/2 Periodic Table Chart 51-52 10/3 Test Review 53-54 10/8 Test Corrections 55-56 10/9 Molecules, Compounds, and Elements 57-58 10/10 Build a Molecule Activity 59-60 10/15 Counting Atoms 61-62 10/16 Counting Atoms with Coefficients 63-64 10/17 Writing Chemical Formulas 65-66 10/18 Physical and Chemical Changes/Properties Notes 67-68 10/21 Chemical Equations and the Conservation of Mass 69-70 10/22 Balancing Equations 71-72

  4. Balancing Act Na + Cl salt

  5. Law of Conservation of Mass Atoms are not ___________ or __________ During a chemical reaction. Scientist know that there must the ________ number of atoms on each _______ of the _________. To balance the chemical equation, you must add _________________ to the different parts of the equation. You cannot _______ or __________ subscripts. created destroyed same side arrow coefficients add remove

  6. Step 1: Determine the number of atoms for each element Mg + O2  MgO 1 Mg = Mg= O= O= 1 2 1

  7. Step 2: Try to add Coefficients to the equation to get the same number of atoms on each side. Mg + O2  MgO 2 2 1 2 Mg = Mg= O= O= 1 2 2 1 2 Balanced!!!

  8. Equation 1: Determine the number of atoms for each element Ca+ O2  CaO 1 Ca= Ca= O= O= 1 2 1

  9. Equation 1: Try to add Coefficients to the equation to get the same number of atoms on each side. Ca+ O2  CaO 2 2 1 2 Ca= Ca= O= O= 1 2 2 1 2 Balanced!!!

  10. Equation 2. 3 N2 + H2  NH3 2 2 1 2 N = N= H=H= 6 6 2 3 Balanced!!!

  11. Equation 3. Cu2O + C Cu + CO2 2 4 2 4 2 2 1 4 Cu = Cu = O= O= C=C= 2 1 2 1 1 Balanced!!!

  12. Equation 4. 2 H2O2 H2O+ O2 2 4 4 2 2 H = H = O= O= 4 2 4 3 Balanced!!!

  13. Balancing Equations Activity Balancing Equations Activity 71 72 . 9/26/11 10/22/2013 10/22/2013 • Application: • Balancing Act Ws • Turn in when complete • Connection: • How is balancing equations like something you have done in math? • Exit: • 2 H + CO3 → H2O +2CO2Draw out this equation in your journal. Draw the atoms. • Is this balanced or unbalanced? • What does this have to do with the conversation of mass? . . Starter: Arrange molecules into an equation: 2 Ag, 2 AgCl, 2 Cl, Practice: Glue Balancing Act Practice here

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