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Catalyst

Catalyst. Classify the following reaction types: CH 4 + O 2  H 2 O + CO 2 H 2 + O 2  H 2 O. Predicting Products. Review: Finding Charges. K + AgNO 3 -> KNO 3 + Ag. S and P block elements: use the group (column) Polyatomic ions (NO 3 ): use cheat sheet

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Catalyst

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  1. Catalyst • Classify the following reaction types: • CH4 + O2 H2O + CO2 • H2 + O2  H2O

  2. Predicting Products

  3. Review: Finding Charges K + AgNO3 -> KNO3 + Ag • S and P block elements: use the group (column) • Polyatomic ions (NO3): use cheat sheet • Transition metals: reverse Kriss - Kross

  4. Review: Finding Charges NaCl + AgNO3 -> NaNO3 + AgCl • S and P block elements: use the group (column) • Polyatomic ions: use cheat sheet • Transition metals: reverse Kriss - Kross

  5. Reaction Type: Combination • Two elements combine to form a compound • A + B -> AB

  6. Predicting the Products of a combination reaction • Use balance of charges (krisskross) for the two elements, ignoring reactant subscripts • Na + Cl2 -> _______________ • Na+Cl- • NaCl Ignore this!

  7. It doesn’t matter if it comes in as O2.KrissKross its charge just like O. • Na (s) and O2(g) -> _____________

  8. Practice part A: 2 minutes • Assume Fe(s) is Iron (III)

  9. Reaction Type: Single Replacement • An element replaces another element in a compound • A + BX -> AX + B • Identify the charges. • The single element will replace the element with like charge IF it is more active

  10. Practice • Zn(s) + CuSO4(aq) -> _______ • Zn(s) + KCl(aq) -> _________

  11. A + BX -> AX + B • Identify the charges. • The single element will replace the element with like charge IF it is more active (higher in activity series) • Cu + Ag2O -> __________ • Cu + Ag2O -> CuO + Ag 2+ 1+ 2-

  12. Activity Series Says which elements are “more active” and can replace others in single replacement. Can it happen? • Cu + Ag2O -> CuO + Ag (YES) • Ag + CuO -> No Reaction because Ag is less active than Cu

  13. Practice • Zn(s) + CuSO4(aq) -> ZnSO4 + Cu • Zn(s) + KCl(aq) -> NO RXN

  14. More Examples: • NiSO4 + Li -> • Ca(OH)2 + Fe ->

  15. More Examples: • NiSO4 + Li -> Li2SO4 + Ni • Ca(OH)2 + Fe -> NO REACTION

  16. Practice Part B: 9 minutes • Check to see if the single reactant is higher in the activity series • If so, it replaces the ion of like charge • KrissKross

  17. Reaction type: Double Replacement • AB + CD -> AD + CB • The cations and anions from two compounds switch partners • NaBr + Ca(OH)2 _______________ • Identify the charges first: • NaBr + Ca(OH)2_______________ • Like charges replace each other. • NaBr + Ca(OH)2 NaOH + CaBr2 1+ 1- 2+ 1-

  18. Examples of Double Replacement NaNO3 + KCl�  __________________ AgNO3 + Na3PO4  __________________

  19. Practice Part C: 16 minutes

  20. Reaction Type: Combustion • A substance reacts with oxygen, releasing energy (Fire!) • Hydrocarbons always combust to make CO2 and H2O: • CxHy + O2 -> CO2 + H2O • Other substance are usually combination • C + O2 -> CO2

  21. Practice Part D: 5 minutes

  22. Exit Question

  23. Exit Question • Predict the Products: • Na2O + CaCl2 -> _______________

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