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Metaphorical Types of Chemical Reactions

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Did you know…

  • You can use an equation to write the composition of everyday objects as well as formulas if they are balanced.

  • We use equations with everyday objects by breaking up the object or building it.

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What is a metaphor?

  • A metaphor is a word or phrase that is used to make a comparison between two people, things, animals, or places.
    • Example:
      • The snow is a white blanket
      • The classroom was a zoo
      • If you add sugar and kool-aid to water, the pattern is of a synthesis reaction.

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Examples

  • Furniture (Bookshelf)
  • Words
  • Cars
  • Electronics
  • Food (Lemonade)
  • Clothes (Flags)
  • Legos
  • Instruments
  • Relationships

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Bicycle Synthesis/Combo Example

  • To create an equation, first recognize the different parts (reactants) of a bike.
    • Frame (1)
    • Wheels (2)
    • Handle (1)
    • Pedals (2)
  • Think about how many of each part there is, for example there are two wheels.
  • Then put it together to create a whole new object (product).
  • The amount of parts you start with must be equal to the amount after the product is made.

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Bicycle Diagram

The final product would look like this.

Note that the reactants and product are separated by an arrow and that no parts were added or lost in the process.

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Don’t forget to balance!

Flag Example:

  • You are creating the American flag. There are 7 red stripes, 6 white stripes, 50 stars and 1 blue square. The equation would be:

7RS+6WS+50S+BSQ → RS7WS6S50BSQ

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  • This is an example of a balanced equation because there is the same amount of material on both sides of the arrow.

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Unbalanced Equations

  • An equation is unbalanced when the amount of material you start with is different from the amount you end with. This includes having the same amount of each individual part before and after.
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  • If you start creating a bookshelf with 6 pieces of wood, but you end up using 7 pieces, you have created an unbalanced situation.
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  • In real life, unbalanced equations cannot exist.

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Balanced or Unbalanced?

  • Tim is building a wall of Legos. Tim has 3 green blocks, 4 red blocks and 2 blue blocks. He uses every piece to build the wall. He writes this following equation to go with his wall:

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  • 3G+4R+2B=G3R3B3

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  • Is his equation balanced or unbalanced? If not, what is the right equation?

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Your turn!

  • If you had the following reactants, what would your balanced equation be: 1 cup water, 2 lemons, and 1 cup sugar?

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A- W+2L+S → WLS

B- 2W+2L+2S → WL2S

C- W+2L+S → WL2S

D- W+2L+S → WLS

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Summative Assessment Project

  • Think about the examples we talked about and create a list of original everyday examples for the four main types of chemical reactions:
    • Combination/Synthesis
    • Decomposition
    • Single Replacement
    • Double Replacement

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Follow the directions on the presentation created for you to make a copy of that is located on my website.

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