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Topic: Chemical Reactions

Topic: Chemical Reactions. Essential Question: What pieces of evidence indicate a chemical reaction has taken place?. Topic: Chemical Reactions Essential Question: What pieces of evidence indicate a chemical reaction has taken place?. Chemical Reactions

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Topic: Chemical Reactions

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  1. Topic: Chemical Reactions Essential Question: What pieces of evidence indicate a chemical reaction has taken place?

  2. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Chemical Reactions Involve a change in chemical composition in substances It is not possible to get back your original substances as something new has been formed. For example: can you take an egg that is cooked, and turn it back to a raw egg?

  3. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Chemical Reactions Chemical equations are used to show what happens to the elements during a chemical reaction CH3COOH + NaHCO3 H2O + NaOCOCH3 + CO2 Sodium Acetate Carbon Dioxide Water Baking Soda Vinegar

  4. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 1.) Gas bubbles For example: Baking soda and vinegar

  5. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 2.) Temperature change

  6. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 3.) Odor (smell) is produced For example: When food goes bad, It produces a smell

  7. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 4.) There is a change in color

  8. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 5.) A precipitate (solid) is formed

  9. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 6.) Heat is produced

  10. Now take some time… • Take 2 minutes to go over your notes and highlight or underline the main ideas that answer the essential question, you should not highlight everything:

  11. Time to use the left hand column • You will now write your own questions using the question starters provided.

  12. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Chemical Reactions Involve a change in chemical composition in substances It is not possible to get back your original substances as something new has been formed. For example: can you take an egg that is cooked, and turn it back to a raw egg? Write a question using one of these question starters: How would you explain…? What is…?

  13. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Chemical Reactions Chemical equations are used to show what happens to the elements during a chemical reaction CH3COOH + NaHCO3 H2O + NaOCOCH3 + CO2 Write a question using one of these question starters: How is…? What is…? Sodium Acetate Carbon Dioxide Water Baking Soda Vinegar

  14. Topic: Chemical ReactionsEssential Question: What pieces of evidence indicate a chemical reaction has taken place? Evidence a chemical change has occurred 1.) Gas bubbles 2.) Temperature change 3.) Odor produced 4.) Color change 5.) Precipitate (solid) is formed 6.) Heat is produced Write a question using one of these question starters: How do you know…? List the…?

  15. Now let’s write a summary Look at each question you wrote on your own, and answer each question in a complete sentence.

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