21 Matching Annotations
  1. Sep 2017
  2. chem.libretexts.org chem.libretexts.org
    *2.7: Nomenclature
    20
    4. jchapman_rn 07 Sep 2017
      13)Zn(HCO3)2 zinc bicarbonate

      Is there an easy way to determine if an element has multiple charges? I originally wrote this as Zinc(II) bicarbonate because it was a transitional metal and I didn't know if it had multiple charges.

      ualrc2d3
    5. DestinHunt2018 06 Sep 2017
      Compounds that consist of a nonmetal bonded to a nonmetal are commonly known as Molecular Compounds, where the element with the positive oxidation state is written first.  In many cases, nonmetals form more than one binary compound, so prefixes are used to distinguish them.

      So when identifying compounds, how come the prefixes aren't added to the metals and just the nonmetals?

      ualrc2d3
    8. Chel6133 06 Sep 2017
      HF (g) = hydrogen fluoride       ->    HF (aq) = hydrofluoric acid HBr (g) = hydrogen bromide    ->     HBr (aq) = hydrobromic acid HCl (g) = hydrogen chloride     ->    HCl (aq) = hydrochloric acid H2S (g) = hydrogen sulfide      ->    H2S (aq) = hydrosulfuricacid

      Are these considered Hydrogen Bonds?

      ualrc2d3
    9. KBlair21 06 Sep 2017
      sulfuric acid (H2SO4) or carbonic acid (H2CO3)

      These acids do not have hydro- as a prefix... is that because they contain polyatomic ions? Would it be incorrect to put hydrosulfuric and hydrocarbonic acid?

      ualrc2d3
    14. jchapman_rn 05 Sep 2017
      Video 2.7.f: (3'19") Acid Salts 2:  YouTube naming the compounds that can form from phosphate (acid, salt, and acid salts)

      Why would H3PO4 not be hydrophosphoric acid?

      edit: I think I figured it out. So if the acid contains a polyatomic ion then the acid is essentially named after that polyatomic ion. Since this acid contains phosphate, it is named after it and named phosphoric acid. Correct?

      ualrc2d3
    15. briymisaac97 05 Sep 2017
      the acid name will have an -ic ending

      Today in class you discussed a set of "rules" (for lack of a better term on my part) that help students navigate basic chemistry concepts. Would we consider this to be an indicator that will steer us in the right direction (specifically pertaining to how to name the polyatomic ion) or more of a set rule that will indefinitely dictate the name of the polyatomic ion?

      ualrc2d3
    18. TaimaS 05 Sep 2017
      2)aluminum carbonate Al2(CO3)3 3)aluminum bicarbonate Al(HCO3)3

      How do I remember to write the compounds like this if the only change was the bicarbonate? Would I just need to memorize it?

      ualrc2d3
    19. exrussell 05 Sep 2017
      Students at UALR need to know the common names for the above metals with variable oxidation state.  

      Would you rather us report something as ferric, stannous, cupric, etc. or do we just need to be familiar with the names?

      ualrc2d3
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    chem.libretexts.org/LibreTexts/University_of_Arkansas_Little_Rock/Chem_1402:_General_Chemistry_1/Chapters/2:_Atoms,_Molecules,_and_Ions/2.8:_Nomenclature_of_Ioinic_Compounds
  3. chem.libretexts.org chem.libretexts.org
    2.5: Chemical Compounds
    1
    1. DestinHunt2018 04 Sep 2017
      The structural formula for H2 can be drawn as H–H and that for I2 as I–I, where the line indicates a single pair of shared electrons, a single bond. Two pairs of electrons are shared in a double bond, which is indicated by two lines—for example, O2 is O=O. Three electron pairs are shared in a triple bond, which is indicated by three lines—

      So do a triple and double bond still count as one bond or is it 2 or 3 bonds when identifying the number of bonds?

      ualrc2d3
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    chem.libretexts.org/LibreTexts/University_of_Arkansas_Little_Rock/Chem_1402:_General_Chemistry_1/Chapters/2:_Atoms,_Molecules,_and_Ions/2.5:_Chemical_Compounds