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Time for Prayer Check Next Prayer Attendance

Time for Prayer Check Next Prayer Attendance. Ms. Doshi. Chapter 5 Review NAMING polyatomic IONs & Acids. Naming Compounds that Contain Polyatomic Ions. polyatomic ions -charged entities made of many atoms Example: NH 4 NO 3 contains these polyatomic ions: NH 4 + and NO 3 - oxyanions

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Time for Prayer Check Next Prayer Attendance

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  1. Time for PrayerCheck Next PrayerAttendance

  2. Ms. Doshi Chapter 5 Review NAMING polyatomic IONs& Acids

  3. Naming Compounds that Contain Polyatomic Ions polyatomic ions -charged entities made of many atoms Example: NH4NO3 contains these polyatomic ions: NH4+ and NO3- oxyanions -polyatomic anions that contain an atom of a given element and different number of oxygen atoms.

  4. Memorize these! Need to give memory aid to students.

  5. Naming Compounds with Polyatomic Ions 1. Similar to binary ionic compounds must memorize common polyatomic ions and learn the composition and charge of each ion in Table 5.4 Example: NH4C2H3O2 is ammonium acetate. 2. When you see a metal that can form one or more cation, use a Roman Numeral. Similar to Type II binary ionic compounds. Example: FeSO4 is iron(II) sulfate

  6. Now, you try!

  7. Name the following compounds

  8. Naming Acids acid: -a molecule with one or more H+ ions attached to an anion Examples: H2SO4, H3PO4

  9. Rules (in your textbook)

  10. Use Rule 2

  11. Names of acids that do not contain oxygen-MEMORIZE

  12. Names of some acids that contain Oxygen-MEMORIZE

  13. Naming Acids: Practice Name each of the following acids:

  14. Write the Formulas from Names

  15. Chapter 5 Review Questions 4, 8, 10, 12, 14, 24, 26, 28, 30, 34, 38, 42, 44, 46, 48 Answers are in your textbook!

  16. Ms. Doshi Chapter 6chemical reactions: an introduction

  17. Evidence for a Chemical Reaction How do we know that a chemical reaction has occurred? • The color changes. (We can see this) • A solid forms. (We can see this.) • Bubbles form. (We can see this.) • Heat and/or a flame is produced, or heat is absorbed. (We can’t see heat but we can feel it).

  18. Evidence of a Chemical Reaction

  19. A Chemical Reaction chemical reaction -represented by a chemical equation reactants -chemicals present before the reaction products -chemicals formed by the reaction reactants products Example: arrow = direction of change, read as “yields” or “produces”

  20. Very IMPORTANT!!! In a chemical reaction, atoms are neither created or destroyed. The number of each type of atom on the reactant side = the number of each type of atom on the product side. This is called balancing the chemical equation

  21. Unbalanced Equation and Balanced Equation Unbalanced Equation Balanced Equation

  22. Physical States Example: Unbalanced Equation with Physical States

  23. Write Unbalanced Equations Read and Understand Example 6.1 Do Exercise 6.1.

  24. A Chemical Equation A chemical equation gives us this information: • the reactants and products • the numbers of each • the physical states We want our equations to be balanced and show the physical states of all of our reactants and products.

  25. How to Write and Balance Chemical Equations Let’s do together: Let’s balance the equation for liquid ethanol. (p154) 1. Read the description of the chemical reaction. What are the reactants? The products, and their states? Write the formulas. 2. Write the unbalanced equation. 3. Balance the equation. Start with the most complicated molecule (the one with the most elements). 4. Check to see that the coefficients used give the same number of each type of atom on both sides of the arrow.

  26. Balancing Chemical Equations I Let’s do together:

  27. Balancing Chemical Equations II Let’s do together:

  28. Balancing Chemical Equations III Let’s do together:

  29. Exercise 6.3 Now, it’s your turn:

  30. Problems to do: RIGHT NOW! Chapter 6 Review 6.2 8, 10, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 6.3 38, 40, and 42

  31. WE ARE NOT FINISHED! Review Exercise to do for Chapters 4 and 5! 19, 21, 22, 23, 24, 26, 28, 30, and 31

  32. Any Questions?Any Answers? Any Comments?

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