Chemistry Flashcards Template Page 6
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13Name the following compounds
Polyatomic Ions and Oxyanions
-1
-1
-Seldomly carry the suffix “ide” (Exceptions are OH
and CN
)
NaF
1.
- Often end in “ite” or “ate” and have prefixes “hypo” or “per”
Au
S
- The names of oxygen polyatomics (often called oxoanions)
2.
2
3
are related to the number of oxygen atoms in the ion.
PbBr
3.
2
Na
SO
4.
2
4
Fe(ClO
)
5.
3
2
Formula
# of oxygens
Name
NH
Cl
6.
4
-1
ClO
hypochlorite
PCl
7.
ClO
-1
chlorite
5
2
-1
ClO
chlorate
3
-1
ClO
perchlorate
4
Ionic Compounds
Ionic Compounds
Hydrates
All common oxyanions of Cl, Br and I carry a charge of -1
Prefix
No. of
Waters
Some series of oxoanions also contain varying numbers
hydrates are ionic compounds containing a
specific number of waters for each formula
of H atoms and are named accordingly.
hemi
½
unit
water of hydration often “driven off” by
mono
1
heating
in formula, attached waters follow
·
di
2
CoCl
·6H
O
2
2
in name attached waters indicated by suffix -
tri
3
- The prefix thio indicates that a
hydrate after name of ionic compound
tetra
4
sulfur atom has replaced in oxygen
CoCl
·6H
O = cobalt(II) chloride hexahydrate
2
2
atom.
CaSO
·½H
O = calcium sulfate hemihydrate
4
2
penta
5
hexa
6
Hydrate
Anhydrous
hepta
7
CoCl
·
CoCl
6H
O
2
octa
8
2
2
Ionic Compounds
Ionic Compounds
6
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