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The following are list of polyatomic ions. These might be advantageous when perfect ChemSkill Builder and Homework problems. The exams will incorporate only the nine us have focused on:


The 9 polyatomic ion to know and write on her 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 way one less oxygen than the -ate form. PREFIXES: per- = one much more oxygen 보다 -ate hypo- = one much less oxygen 보다 -ite

Ions arranged by family

Polyatomic cations other than ammonium, hydronium, and mercury(I) aren\"t typically encountered in general chemistry. Most common polyatomic anions occur in \"families\". Every members the the household share the same main element and the same charge. There room three common types of variations within the family:

Different members of the family can have actually numbers the oxygens. Each member that the family can integrate with hydrogen ion to partially neutralize their negative charge. Part members the the household can have sulfur substituted because that oxygen. Various other variations exist but are much less common.

Table of common polyatomic cations, arranged by family.

You are watching: Which one of the following polyatomic ions has the same charge as the hydroxide ion?

alternative names are offered in italics. Pick the name of the ion for information about its occurrence, uses, properties, and also structure. Blank entries room uncommon or unstable; for a finish table check out the field Guide to 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 can remember the formula that the ion whose surname ends with ate, friend canusually job-related out the recipe of the other household members together follows: modify stem surname with:
meaningexamples
-atea typical form, include oxygen chlorate, ClO3-nitrate, NO3-sulfate, SO42-
-iteone much less oxygen 보다 -ate formchlorite, ClO2-sulfite, SO32-nitrite, NO2-
per-, -atesame charge, but contains one more oxygen 보다 -ate formperchlorate, ClO4-perbromate, BrO4-
hypo-, -itesame charge, but contains one less oxygen 보다 the -ite formhypochlorite, ClO-hypobromite, BrO-
thio-replace one O with an Sthiosulfate, S2O32-thiosulfite, S2O22-
Some anions can record hydrogen ions. Because that example, carbonate (CO32- can catch an H+ to produce hydrogen carbonate HCO3- (often referred to as bicarbonate). Each captured hydrogen neutralizes one minus fee 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) captured H+ ionsdihydrogen phosphate, H2PO4-

Table of usual polyatomic cations, i ordered it by charge. alternate names are provided in italics. Select the surname of the ion for information around 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 space made from an ext that one atom. This group of atom act together as one unit through a single charge. Each of the polyatomic ions have a distinctive name.

Table the 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 of the polyatomic ions space anions. The formula because that the compound will contain both a cation and also an anion to balance the overall charge the the compound.

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The cation is named normally and also the anion is provided the surname of the really anion. One easy means to acknowledge these recipe is the fact that they are comprised of more that two facets and, usually, the an initial element is a metal.