Chapter 6 section 3 pages 234 239
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Chapter 6, Section 3 Pages 234-239. Controlling Chemical Reactions. Activation Energy- Draw !. The minimum amount of energy needed to start a chemical reaction. All chemical reactions require a certain amount of activation energy to get started. Figure 12, page 235.

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Chapter 6, Section 3 Pages 234-239.

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Chapter 6 section 3 pages 234 239

Chapter 6, Section 3Pages 234-239.

Controlling Chemical Reactions


Activation energy draw

Activation Energy-Draw!

  • The minimum amount of energy needed to start a chemical reaction.

  • All chemical reactions require a certain amount of activation energy to get started.

  • Figure 12, page 235.


Rates of chemical reactions

Rates of Chemical Reactions

  • Chemical reactions do not occur all at the same rate. Some are very fast, while others are slow.

  • Factors that affect rates of reaction include surface area, temperature, concentration, and the presence of catalysts or inhibitors.

  • Figures 13 & 14, pg.’s 236-237.


Concentration

Concentration

  • The amount of a substance in a given volume. (Fig. 15, pg. 238)

    • Adding a spoonful of sugar to lemonade will make it sweet, but adding a larger spoonful of sugar to the lemonade will make it even sweeter. The glass with more sugar has a greater concentration of sugar molecules.


Catalyst

Catalyst

  • A material that increases the rate of a reaction by lowering the activation energy.

  • Figure 16, pg. 239.


Enzymes draw

Enzymes-Draw!!!

  • Biological catalysts that are very specific. (Fig. 16, pg. 239)

    • Your body contains thousands of different enzymes, each of which only affect one chemical reaction.


Inhibitor draw

InhibitorDraw!!!

  • A material that prevents reactants from coming together.

    • Preservatives in food are inhibitors used to prevent the food from spoiling.


Questions

Questions???


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