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The complying with are perform of polyatomic ions. These might be helpful when perfect ChemSkill Builder and Homework problems. The exams will encompass only the nine us have concentrated on:


The 9 polyatomic ion to know and also write on your notecard:
Name Charge Formula
Hydroxide 1- OH-
Cyanide 1- CN-
Nitrate 1- NO3-
Acetate 1- CH3COO-
Carbonate 2- CO32-
Phosphate 3- PO43-
Hydronium 1+ H3O+
Ammonium 1+ NH4+
Sulfate 2- SO42-

Other polyatomic ions:

acetateC2H3O21-
ammoniumNH41+
arsenateAsO43-
azideN31-
bicarbonate (hydrogen carbonate)HCO31-
bisulfate (hydrogen sulfate)HSO41-
borateBO33-
bromateBrO31-
carbonateCO32-
chlorateClO31-
chromateCrO42-
cyanateOCN1-
cyanideCN1-
dichromateCr2O72-
dihydrogen phosphateH2PO41-
ferricyanideFe(CN)63-
ferrocyanideFe(CN)64-
formateCHO21-
hydrogen lead carbonate (bicarbonate)HCO31-
hydrogen sulfate(bisulfate)HSO41-
hydroxideOH1-
iodateIO31-
manganate**MnO42-
metasilicateSiO32-
molybdateMoO42-
monohydrogen phosphateHPO42-
nitrateNO31-
oxalateC2O42-
permanganate**MnO41-
phosphatePO43-
phthalateC8H4O42-
selenateSeO42-
silicateSiO44-
sulfateSO42-
tartrateC4H4O62-
thiocyanateSCN1-
thiosulfateS2O32-
tungstateWO42-

** exemption to prefix rulesNOTE: -ite ending means one less oxygen than the -ate form. PREFIXES: per- = one more oxygen 보다 -ate hypo- = one much less oxygen 보다 -ite

Ions arranged by family

Polyatomic cations other than ammonium, hydronium, and also mercury(I) aren"t generally encountered in basic chemistry. Most common polyatomic anions happen in "families". All members that the family share the same central element and also the very same charge. There room three common species of variations in ~ the family:

Different members that the family members can have actually numbers the oxygens. Each member the the household can incorporate with hydrogen ions to partly neutralize their negative charge. Some members that the family can have actually sulfur substituted for oxygen. Other variations exist but are much less common.

Table of common polyatomic cations, arranged by family.

You are watching: What is the formula for the acetate polyatomic ion?

alternate names are provided in italics. Choose the name of the ion because that information about its occurrence, uses, properties, and also structure. Empty entries space uncommon or unstable; for a finish table check out the ar Guide come Polyatomic Ions.

carbon
nitrogensulfurchlorine
CO32-carbonate
HCO3-hydrogen carbonate(bicarbonate)
NO3-nitrate
NO2-nitrite
SO42-sulfate
SO32-sulfite
S2O32-thiosulfate
HSO4-hydrogen sulfate(bisulfate)
HSO3-hydrogen sulfite(bisulfite)
ClO4-
perchlorate
ClO3-chlorate
ClO2-chlorite
ClO-hypochlorite
phosphoruscyanidecationsmetal oxyanions
PO43-phosphate
HPO42-hydrogen phosphate
H2PO4-dihydrogen phosphate
CN-
cyanide
OCN-cyanate
SCN-thiocyanate
NH4+
ammonium
H3O+hydronium
Hg22+mercury(I)
CrO42-
chromate
Cr2O72-dichromate
MnO4-permanganate
oxygenorganics
OH-hydroxide
O22-peroxide
C2H3O2-
acetate

Common specify name practices

If you have the right to remember the formula that the ion whose name ends v ate, friend canusually job-related out the recipe of the other family members as follows: modify stem name with:
meaningexamples
-atea usual form, include oxygen chlorate, ClO3-nitrate, NO3-sulfate, SO42-
-iteone less oxygen than -ate formchlorite, ClO2-sulfite, SO32-nitrite, NO2-
per-, -atesame charge, but contains one more oxygen than -ate formperchlorate, ClO4-perbromate, BrO4-
hypo-, -itesame charge, but contains one less oxygen 보다 the -ite formhypochlorite, ClO-hypobromite, BrO-
thio-replace an O through an Sthiosulfate, S2O32-thiosulfite, S2O22-
Some anions can record hydrogen ions. Because that example, lead carbonate (CO32- can record an H+ to produce hydrogen carbonate HCO3- (often referred to as bicarbonate). Each recorded hydrogen neutralizes one minus charge on the anion.
modify stem surname with:meaningexamples
hydrogenor bi-(1) captured H+ ionshydrogen carbonate, HCO3- (a.k.a. Bicarbonate)hydrogen sulfate, HSO4- (a.k.a. Bisulfate)
dihydrogen(2) recorded H+ ionsdihydrogen phosphate, H2PO4-

Table of usual polyatomic cations, arranged by charge. alternate names are offered in italics. Choose the name of the ion for information about its occurrence, uses, properties, and also structure.

+2
Hg22+mercury(I) or mercurous
+1
NH4+ammonium
H3O+hydronium
-1
C2H3O2-acetate
ClO3-chlorate
ClO2-chlorite
CN-cyanide
H2PO4-dihydrogen phosphate
HCO3-hydrogen carbonate or bicarbonate
HSO4-hydrogen sulfate or bisulfate
OH-hydroxide
ClO-hypochlorite
NO3-nitrate
NO2-nitrite
ClO4-perchlorate
MnO4-permanganate
SCN-thiocyanate
-2
CO32-carbonate
CrO42-chromate
Cr2O72-dichromate
HPO42-hydrogen phosphate
O22-peroxide
SO42-sulfate
SO32-sulfite
S2O32-thiosulfate
-3
PO43-phosphate

Ion

Two-Dimensional Structure

Three-Dimensional Representation

Ammonium NH4+

*
*
Hydronium H3O+
*
*

Ion

Two-Dimensional Structure

Three-Dimensional Representation

Bicarbonate HCO3-
*
*
Cyanide CN-
*
*
Hydrogen Sulfate HSO4-
*
*
Hydroxide OH-
*
*
Nitrate NO3-
*
*
Nitrite NO2-
*
*
Perchlorate ClO4-
*
*
Permanganate MnO4-
*
*

Ion

Two-Dimensional Structure

Three-Dimensional Representation

Carbonate CO32-
*
*
Chromate CrO42-
*
*
Dichromate Cr2O72-
*
*
Hydrogen Phosphate HPO42-
*
*
Sulfate SO42-
*
*
Sulfite SO32-
*
*
Thiosulfate S2O32-
*
*

Ion

Two-Dimensional Structure

Three-Dimensional Representation

Phosphate PO43-
*
*
Polyatomic formulas - Polyatomic ions are made from an ext that one atom. This team of atoms act together as one unit v a single charge. Each of the polyatomic ions have a distinct name.

Table of Polyatomic ion

1+1-2-3-
ammonium , NH4 +acetate, C2H302-carbonate, CO32-phosphate, PO43-
bicarbonate, HCO3 -chromate,CrO42-
bisulfate, HSO4 -dichromate,Cr2O72-
bisulfite, HSO3 -oxalate,C2O42-
chlorate,ClO3-peroxide,022-
chlorite,ClO2-silicate,SiO32-
cyanide,CN-sulfate,SO42-
hydroxide,OH-sulfite,SO32-
hypochlorite,ClO-tartrate,C4H4062-
iodate,IO3-thiosulfate,S2O32-
nitrate,NO3-
nitrite,NO2-
perchlorate,ClO4-
permanganate,MnO4-

Most that the polyatomic ions are anions. The formula because that the compound will certainly contain both a cation and also an anion come balance the as whole charge that the compound.

See more: Something That Has Water In It, Name Something That Has Not Got Water In It

The cation is named normally and the anion is given the name of the yes, really anion. One easy way to acknowledge these formulas is the fact that castle are consisted of of more that two elements and, usually, the an initial element is a metal.