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Moles PowerPoint Presentation

Moles

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Moles

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  1. Moles & Stoichiometry

  2. Formula Writing and Naming

  3. Formulas indicate the type and number of element in the compound

  4. Writing Formulas NaCl Sodium Chloride - Beryllium Oxide - BeO

  5. Magnesium Fluoride - MgF2 Lithium Sulfide - Li2S

  6. Rules: 1. Write each symbol 2. Assign oxidation numbers 3. Balance oxidation numbers

  7. Metals & Non-metals Naming CaO - Calcium Oxide KBr - Potassium Bromide Li2S - Lithium Sulfide

  8. Cs3P - Cesium Phosphide

  9. Rules: 1. Name metal 2. Name non-metal, change ending to -ide

  10. Non-metals & Non-metals Naming Just have to use prefixes for the number of each element represented.

  11. Prefix- 1 - Mono- 2 - Di- 3 - Tri- 4 - Tetra- 5 - Penta-

  12. N2O2- Dinitrogen dioxide CO- Carbon monoxide SiCl4- Silicon tetrachloride Pentarsenic trichloride As5Cl3-

  13. Rule: • Don’t use “Mono-” for the first element

  14. Polyatomic Ions - Found on your charts - Treat as if they are one.

  15. Naming with Polyatomic Ions Na2CO3- Sodium carbonate Magnesium hypochlorite Mg(ClO)2 -

  16. Sr(NO2)2 - Strontium nitrite KSCN - Potassium thiocyanate NH4Cl - Ammonium chloride

  17. Rule: 1. Name 1st element or polyatomic ion 2. Name 2nd element or polyatomic ion

  18. Caution: If second part is an element change ending to -ide

  19. Formula Writing Silver permanganate - Ag(MnO4) Aluminum chlorate - Al(ClO3)3

  20. Stock System - Used when the first element has more than one oxidation number.

  21. Naming with Stock System MnO2 - Manganese (IV) oxide AuCl3 - Gold (III) chloride

  22. Pb(Cr2O7)2 - Lead (IV) dichromate Hg(CH3COO) - Mercury (I) acetate

  23. Writing Formulas NiBr3 Nickel (III) bromide - Germanium (II) hypochlorite - Ge(ClO)2