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Quiz What is the oxidation number for phosphorous in P4O6?

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Presentation on theme: "Quiz What is the oxidation number for phosphorous in P4O6?"— Presentation transcript:

1 Quiz What is the oxidation number for phosphorous in P4O6?
If sulfur becomes an ion, what is its oxidation number? What is the name of the following chemical? CaBr2? Write the following in the Stock method and Latin method: FeBr3 What is the chemical formula for lithium sulfate?

2 GC Quiz What is the oxidation number for phosphorous in P4O6?
What is the oxidation number for magnesium in MgCl2 If sulfur becomes an ion, what is its oxidation number? What is the name of the following chemical? CaBr2? What is the chemical formula for potassium nitride?

3 3.2 Molecular Compounds (Covalent Compound)

4 Please memorize the following polyatomic ions and their charges
Hydroxide OH- Carbonate CO3 2- Nitrate NO3- Sulfate SO4 2- Bromate BrO3 – Phosphate PO4 3- Ammonium NH4+

5 The most common polyatomic ion is simply “–ate”
Least amount of oxygen is “hypo—ite” One more oxygen is “—ite” One more oxygen is “—ate” One more oxygen is “per–ate”

6 1 more oxygen “Most common” 1 less oxygen 2 less oxygens Carbon
percarbonate CO42- Carbonate CO32- Carbonite CO22- hypocarbonite CO2- Bromine Perbromate BrO4- Bromate BrO3- Bromite BrO2- Hypobromite BrO- Sulfur persulfate SO52- sulfate SO42- Sulfite SO32- Hyposulfite SO22- Nitrogen Nitrate NO3- Nitrite NO2- Phosphorus Phosphate PO43- Phosphite PO33- Hypophosphite PO23-

7 Molecular Compounds Molecular compounds refer to compounds with covalent bonds Covalent bonds form between two nonmetal elements How do ionic compounds and molecular compounds differ?

8 Is Li2O a molecular compound?
No! It’s ionic. Because it is formed from a metal and a nonmetal What is it called? Is N2O a molecular compound? Yes! A covalent bond forms between the two nonmetal elements.

9 How to name molecular compounds
When naming molecular compounds, you must state the number of atoms using numerical prefixes. *The “mono-” prefix is never used for the first atom 1st non-metal + root of 2nd non-metal + -ide

10 Examples NO Nitrogen monoxide (why not mononitrogen?) N2O
Dinitrogen monoxide S2Cl2 Disulfur dichloride Cl2O7 Dichlorine heptoxide

11 BF3 NO N2O5 PCl5 P4O6 Boron trifluoride Nitrogen monoxide Dinitrogen pentoxide Phosphorus pentachloride Tetraphosphorus hexoxide

12 Nitrogen Trifluoride Nitrogen dioxide Carbon dioxide Triphosphorus tetrachloride Dihydrogen monoxide NF3 NO2 CO2 P3Cl4 H2O

13 Hydrates Ionic crystals with a certain number of water molecules as part of its structures. Ex: Name the ionic compound first, then add “hydrate” with proper Greek prefix to indicate number of water molecules

14 Practice BaCl2 • 2H2O Barium chloride dihydrate Na2CO3 • 10H2O
Sodium carbonate decahydrate * CoSO4 • 6H2O Cobalt (II) sulfate hexahydrate

15 Naming Acids Acids are compounds that produce H+ ions
There are 2 methods to name acids 1) Acids that do not contain oxygen 2) Acids that do contain oxygen

16 Acids that do not contain oxygen
Generally a binary acid (what does this mean?) Hydro + root of non-metal + “ic” + acid HCl Hydrochloric acid H2S Hydrosulfuric acid (dihydrogen monosulfide can also work, and is considered a ‘common name’)

17 Acids that do contain oxygen
These are acids with polyatomic ions Use the anion molecule to name acid, and add “acid” at end

18 If anion ends with “–ate” add a “-ic”
If anion ends with “-ite” add a “-ous” H2SO The anion is SO42-, or sulfate Sulfuric acid H2SO The anion is SO32-, or sulfite Sulfurous acid “Hydro-” is used on acids without oxygen only.

19 Examples Acid Anion acid name Nitric acid Nitrous acid Phosphoric acid
Phosphorous acid HNO3 HNO2 H3PO4 H3PO3 Nitrate, NO3- Nitrite, NO2- Phosphate PO43- PhosphitePO33-

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