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The L.A.S.T Method

Mr. Quinn & Ms. Tom February 4, 2014 Aim: How do we balance chemical equations? Do Now: What is the total number of each atom on either side of this balanced chemical equation? 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. The L.A.S.T Method. L ist your elements

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The L.A.S.T Method

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  1. Mr. Quinn & Ms. Tom February 4, 2014Aim: How do we balance chemical equations?Do Now: What is the total number of each atom on either side of this balanced chemical equation?6 CO2 + 6 H2O  C6H12O6+ 6 O2

  2. The L.A.S.T Method • List your elements • Add up atoms on each side • Start from left to right • Test Results

  3. Example 1 Zn + O2ZnO

  4. Example 2 C4H10+ O2 CO2 +H2O

  5. Example 3 FeCl3+ MgCO3Fe2(CO3) 3 + MgCl2

  6. Example 4 Na + Zn(NO3)2 Zn + NaNO3

  7. Your Turn!

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