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Chapters 9 Chemical Reactions and Equations

Goals for Chapter 9. Describe, compose, and balance chemical equations. Use Activity series to predict reactions. Recognize the main types of chemical reactions predict products. Understand the solubility chart. Describing Chemical Reactions. OK, so what is a chemical reaction?What are th

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Chapters 9 Chemical Reactions and Equations

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    2. Goals for Chapter 9

    3. Describing Chemical Reactions OK, so what is a chemical reaction? What are the main parts of a chemical reaction? Define chemical equation: Law of Conservation of mass tells us:

    4. LCM

    5. How can we tell a reaction has taken place? heat or light can also happen with physical changes gas bubbles means a gas is being created as product precipitate solid is being created color change

    6. Chemical Equations

    7. Word and Formula Equations The coefficient:

    8. Lettuce get the formulas right first!

    9. Symbols used in Chemical Equations

    10. Balancing Chemical Equations What is the point? What are the rules?

    11. Let’s try some

    12. Balancing the equations – Rules Continued

    13. Try some!

    14. More?

    15. Types of Chemical Reactions Recognize the 5 main types of reactions: Example: Synthesis reaction between an element and oxygen:

    16. #1 - Synthesis Reactions Two or more substance combine to form a new compound: A + X AX

    17. Synthesis reactions continued Metals reacting with Halogens Reactions with oxides

    18. #2 - Decomposition Reactions A single compound (reactant) undergoes a process where two or more simpler substances are produced: AX A + X

    19. Other types of Decomposition Reactions

    20. #3 - Single Replacement Reaction AKA “displacement reactions”, is where a single element replaces a similar element in a compound. General equations:

    21. Single Replacements Continued

    22. How to predict SRR

    23. #4 - Double Replacement Reactions Ions of two compounds exchange places in solution to form two new compounds:

    24. Solubility Table

    25. Lastly, #5 - Combustion Reactions Substances combining with oxygen releasing energy in the form of heat and light, and water, and mainly CO2:

    26. Name some reactions

    27. What’s Next? Chapters 10 and 11 – The Mole and The Mathematics of Chemical Equations Please R&O Chapters 10 and 11 – print off all materials listed for these chapter.

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