Someone help please? More chemistry revision
2006-10-18 07:26:22 · 3 answers · asked by x me x 2 in Science & Mathematics ➔ Chemistry
A simple answer is that -ate is used the maximum oxygen that a particular anion can hold, whether it be SO4 (sulphate) or NO3 (nitrate).
If there is no oxygen at all, then -ide is used. Take one oxygen off maximum, and -ite is used.
2006-10-18 07:37:09 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
Polyatomic Compounds.
1. Names of Polyatomic Ions
1. Anions are negative, Cations are positive
2. ammonium ion NH41+
3. -ide ions
1. CN1- cyanide
2. OH1- hydroxide
4. Oxyanions
1. -ate ate more oxygen.
FormulaName
NO21- nitrite
NO31- nitrate
2. Sometimes oxyanions have an extra hydrogen
FormulaName
SO42-sulfate
HSO41-hydrogen sulfate (or bisulfate)
3. If more than two possibilities:
FormulaName
ClO1- hypochlorite
ClO21- chlorite
ClO31- chlorate
ClO41- perchlorate
2. Naming compounds with polyatomic ions
1. Positive charge species on left (using Stock method or common name)
2. Negative charge species on right (using name of polyatomic ion)
3. Use parentheses as needed
Formula Ions Name
BaSO4 Ba2+ and SO42- barium sulfate
Ca(NO3)2 Ca+2 and NO31- calcium nitrate
Ca(NO2)2 Ca+2 and NO21- calcium nitrite
Fe(NO3)2 Fe2+ and NO31- iron (II) nitrate or
ferrous nitrate
2006-10-18 14:30:55 · answer #2 · answered by DanE 7 · 0⤊ 0⤋
-ite and -ate are suffixes for 'oxyanions,' negative ions with oxygens in them. They are found in 2 forms, usually, one with more and one with less oxygen atoms. -ite is the form with fewer oxygens, -ate has more oxygens (NO2- is Nitrite, NO3- is Nitrate).
-ide is used as a suffix for the anion (negative ion) in a compound. ie: NaCl is Sodium chloride.
2006-10-18 14:43:28 · answer #3 · answered by MadScientist 4 · 0⤊ 0⤋