Naming Molecular Compounds
Just going over a quick review on my chemistry stuff. When naming molecular compounds, should the prefix system be used for compounds involving Hydrogen? For example, would H2I be Hydrogen Iodide, or Dihydrogen Iodide?
October 19, 2010
10 Comments • Newest first
[quote=andyhoang26]@uLtimatefx: Annoying concepts ftl [/quote]
True 'dat :O
@andyhoang26: I don't mind memorizing info as long as it's not some retarded stuff that don't make sense.
@andyhoang26: We talked a little about alkanes, alkenes and cycloalkanes then the bell rang
@andyhoang26: I was also doing some Organic Chemistry today. We started with Hydrocarbons.
@andyhoang26: Lol I was doing that in chemistry earlier today. Coincidence
It depends on how it's used.
If it's like HCl, it's hydro-(blah) because the Cl is...alone, for lack of better terminology.
If it's like HNO3, the hydrogen stays "silent"
[quote=andyhoang26]General rule of thumb with Hydrogen: if its H + some other element/compound, it is most likely an acid.[/quote]
H + Non-metal
[quote=carnagechaos]I understand something like CCl4 is Carbon Tetrachloride, or P2F5 is Diphosphorous pentaflouride. I'm just wondering if the rules also apply for compounds with Hydrogen, because I've heard you're not suppose to, but there are some exceptions. Just trying to make sure.[/quote]
If the hydrogen compound is an aqueous solution, then it should be named as an acid e.g. HCl (aq)
For acids, if the anion ends with -ide then drop the -ide and add -ic to the end. Also, add hydro- to the beginning e.g. Hydrochloric acid
if the anion ends with -ite, drop the -ite and add -ous to the end HNO2=nitrous acid
if the anion ends with -ate, drop the -ate and add -ic to the end HSO4=sulfuric acid
If the state of the compound is not (aq) then you name it like any other ionic compound.
[quote=MissMaylie]you use prefixes in molecular compounds
think about it; you don't need prefixes in ionic compounds because if you know the elements' valence number, you'd know the number[/quote]
I understand something like CCl4 is Carbon Tetrachloride, or P2F5 is Diphosphorous pentaflouride. I'm just wondering if the rules also apply for compounds with Hydrogen, because I've heard you're not suppose to, but there are some exceptions. Just trying to make sure.
you use prefixes in molecular compounds
think about it; you don't need prefixes in ionic compounds because if you know the elements' valence number, you'd know the number