AP Chemistry Summer 2006 Assignments

  1. Memorize these polyatomic ions:

    Positive Ions    : mercury(I) and ammonium

    Negative Ions: hydroxide, nitrate, nitrite, cyanide, chromate, dichromate, permanganate, peroxide, carbonate, sulfate, sulfite, phosphate, acetate, perchlorate, chlorate, chlorite and hypochlorite.

    Open up one of the following to study: (pdf). You should learn their charge as well as their formulas. (Do this assignment first. It'll make the rest of the assignments easier.) ONLY memorize the ones listed on this page. You may want to make Flashcards to help.

  2. Memorize the six strong acids:
    HClO4 (aq) perchloric acid HI (aq) hydroiodic acid
    HCl (aq) hydrochloric acid HNO3 (aq) nitric acid
    HBr (aq) hydrobromic acid H2SO4 (aq) sulfuric acid


  3. Memorize the solubility rules (pdf):

    1. Any compound with a group 1 ion (Li+, Na+, K+) or NH4+ will be soluble.
    Example: NaCl, and K2SO4 are soluble.

    2. All common nitrates (NO3-) and acetates (C2H3O2-) are soluble.
    Example: CuNO3 and AgC2H3O2 are soluble.

    3. All binary compounds of the halogens: Br-, I- and Cl- (not including F-) are soluble, unless in combination with Ag+, Hg22+ , and Pb2+.
    Example: CuBr and CoCl2 are soluble.
    AgCl and PbI2 are NOT soluble.

    4. All sulfates( SO42-) are soluble except when in combination with Ba2+, Sr2+, Ca2+, Pb2+, Ca2+ and Hg22+.
    Example: CuSO4 and NiSO4 are soluble.
    BaSO4 and CaSO4 are NOT soluble.

    5. Except for those in Rule 1, CO32-, OH-, O2-, S2- and PO43- containing compounds are NOT soluble.
    Example: Co(OH)2 and Ca3(PO4)2 are NOT soluble
    NaOH and (NH4)2S are soluble.


  4. Review writing chemical formulas (also known as nomenclature).

    a. Go to the following links to review writing formulas:

b. Go to the following links to practice writing formulas. Try at least 10 from each page. Read the directions at the top of the page before trying.