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Foundations of Physical Science. Workshop: Periodic Table Tiles. Chemical Equations and Recipies. CPO Science. How can we model the rearrangement of atoms that happens during a chemical reaction? How can we predict chemical formulas?. Key Questions. Chemical reactions and the environment.

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Foundations of physical science l.jpg

Foundations of Physical Science

Workshop: Periodic Table Tiles



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How can we model the rearrangement of atoms that happens during a chemical reaction?

How can we predict chemical formulas?

Key Questions


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Chemical reactions and the environment during a chemical reaction?

  • What are the features of a chemical reaction? What general things happen on the atomic level?

  • How can we model a chemical reaction on paper?


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Obeying the law of conservation of mass during a chemical reaction?

  • For a completely correct model, we must be sure that there are equal numbers of each type of atom on left and right side.


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Using the periodic table tiles to model chemical reactions during a chemical reaction?

  • Inventory and organize tiles in bag labeled “Modeling equations”

  • Model the reactants only, using correct chemical formulas

  • USING ONLY THE REACTANT TILES, try to form the products.

  • What happened?

  • Fill in the chart


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What if products cannot be formed by using only reactant tiles?

  • Something must be done so the law of conservation of mass is obeyed in our model

  • Model the entire equation as is, and then fill in the chart.


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Observe a chemical reaction tiles?

  • Make sure the bag is sealed tightly

  • Unscrew the vial top without opening the bag

  • Mix the contents and note all observations




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What are the reactants? occurred?

  • Calcium chloride: ice melt or driveway “heat”

    CaCl2

  • Sodium bicarbonate: baking soda

    NaHCO3


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What about the red liquid? occurred?

  • Phenol Red acts as an indicator

  • The water component of the Phenol Red solution acts as a solvent for solid reactants


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CaCl occurred?2+NaHCO3 ?


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What are the products? occurred?

  • Sodiumchloride: table salt

    NaCl

  • Calciumcarbonate: chalk

    CaCO3

  • Carbonic acid: found in cola

    H2CO3


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CaCl occurred?2+NaHCO3NaCl+CaCO3 + H2CO3

heat

H2CO3H2O+CO2


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CaCl occurred?2+NaHCO3NaCl+CaCO3 + H2CO3


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Molecular Crossword Game occurred?

  • Similar to Scrabble

  • Each player maintains 10 tiles

  • Use periodic table with oxidation numbers to form compounds and molecules

  • Add up atomic numbers to determine score


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Playing Molecular Crossword occurred?

  • Either side of tile can be used; + and arrow tiles are “wild tiles”

  • Atoms may be arranged in any order, horizontal or vertical

  • Oxidation numbers must add up to zero

  • Score = sum of atomic numbers

  • Correct challenge: challenger scores 25, player loses turn

  • Incorrect challenge: challenger loses 25, play continues