Chemistry 3

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  • Huh? What does chili have to do with chemical reactions this time?
  • Now I have a craving for chili. If you want me to continue teaching you how to balance chemical equations, you must treat me to a bowl of chili!
  • Now, when we write chemical equations, we need to have the formulas for the reagents, the stuff that's going to do the chemical reaction, on the left side and the formulas for the products, the stuff you make, on the right.
  • If we were to simply put the formulas of the chemicals on the left and right without saying how much of it was going to react, then we would run the risk of saying that the mass of what we end up with is different than the mass of what we started with. This would be the same thing as writing a recipe where we didn't specify how much of each ingredient is needed to make the chili.
  • The chili was good. Now I'm more than ready to explain how to balance a chemical equation. Just let me get a piece of paper.
  • Let me give you an example: C3H8 + O2 --> H2O + CO2. First you have to write down the number of atoms that you have on each side of the equation.
  • Left side:------Right side: ---- 3 carbon--------------1 carbon 8 hydrogen-------2 hydrogen 2 oxygen--------3 oxygen
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