The discussion revolves around the naming of ionic compounds from their chemical formulas, specifically focusing on the compounds CaO and PbCrO4. Participants explore the definitions of oxoanions and the naming conventions associated with them, addressing both theoretical and practical aspects of chemical nomenclature.
Participants express disagreement regarding the classification of CaO as an oxoanion and the naming conventions for both CaO and PbCrO4. The discussion remains unresolved as participants hold differing views on the definitions and applications of chemical nomenclature.
There are limitations in the discussion regarding the definitions of oxoanions and the specific naming conventions applied to different types of compounds. The participants do not reach a consensus on these points.
Borek said:This is not an oxoanion.
Besides, it happens that calcite is a (historical) name of mineral - calcium carbonate.
Ok there is another part of the problem and it is name the following compound PbCrO4. It says the answer is lead(2) chromate. Why would it be this answer because this shouldn't be a oxyanion either? Why wouldn't it be lead chromium oxide?Borek said:CaO has no charge.
Borek said:This is a completely different compound - and it is a salt, made of lead(II) (Pb2+) and chromate anion (CrO2-). CrO2- is an oxyanion (and has a charge, which in a compound is neutralized by the opposite charge of lead, yielding PbCrO4).
Note that the first compound contained only one metal (Ca) combined with oxygen, the latter contains two metals (Pb and Cr) - that's a strong hint it is not a simple oxide.