Give the systematic names for the formulas or the formulas for the names?

Question

I took Chemistry last year, this is Chemistry 2.

We're reviewing this now, it's nomenclature right?

Anyways, are there any helpful websites you know of that will help me review these?

There are a few I need help with-

1. CoO
2. mercury (I) chloride
3. Pb (C2H3O2)2 -X- (It was a dot)3H2O
4. Chromic Oxide

Thanks so much!

Don't be a jerk, please just answer the question if you can...

Answer 1

CoO = cobalt oxide. Cobalt is a transition metal like iron and nickel. The oxides of transition metals are usually of the form M2O3 as in iron oxide, Fe2O3. Transition metals have valences of two or three. The oxides usually involve metals with a valence of three.

Mercury(I) Chloride is HgCl. Mercury can have a valence of 1 or two. Mercury(II) Chloride is HgCl2. Mercury chloride was once an antibiotic used to treat syphylis. Mercury is toxic and the salt is corrosive. This might have been the origin of the phrase "the cure is worse than the disease".

Pb(C2H3O2)2.3H2O = Lead Acetate trihydrate. Carbon compounds with formulas like C2H3O2 can be any of a number of chemicals, but I'm guessing it is the acetate because this is lead's most soluable salt and because of this, one of the better known ones. The "trihydrate" part is the three water molecules associated with each lead acetate molecule. The crystals are hard and dry, but contain water within the crystal matrix. Copper Sulfate pentahydrate , CuSO4.5H2O , forms pretty blue crystals. If heated the water escapes as steam, leaving a white powder. Epsom salts (Magnesium sulfate) have 7 water molecules.

Chromic Oxide - CrO3, or chromium trioxide. Another name is chromic acid. It is prepared by mixing concentrated sulfuric acid with chromium oxide. Chromic acid is a powerful oxidizing agent and organic chemists use it to clean dirty glassware (rather like oven cleaner, but its acid, not basic). Chromic acid is also the starting material in chrome plating. Electricity is used to deposit a layer of chromium on a metal dipped in a solution of chromic acid.

Answer 2

Answers:

1) Cobalt(II) Oxide
2) Hg2Cl2
3) Lead(II) Acetate Tri-Hydrate or Tri-Hydratated, it depends on your professor.
4) Cr2O3

Glad I was of help! :)

Answer 3

1. Cobalt (II) oxide
2. Hg2Cl2
3. Lead (II) acetate tri-hydrate
4. (can't remember...Just google it.)

Answer 4

Na2[CoCl4]