Polyatomic IonsPolyatomic Ions

What is a cation afraid of?Answer: A dogion…

Many ionic compounds are not binary Many ionic compounds are not binary because one or both ions contain because one or both ions contain atoms of more than one element. atoms of more than one element.

These These polyatomic ions consist of two polyatomic ions consist of two or more different non-metal atoms, or more different non-metal atoms,

which are joined by covalent bondswhich are joined by covalent bonds. . There is only one common There is only one common

polyatomic cation: the ammonium polyatomic cation: the ammonium ion, NHion, NH44

++.. There are many There are many polyatomic anions. polyatomic anions. Except for the Except for the

hydroxide ion, the names of thehydroxide ion, the names of the

anions end inanions end in

““-ate-ate””

instead of “ide”.instead of “ide”. Writing formulas is Writing formulas is also the same, except that you have to also the same, except that you have to

add parentheses when the formula add parentheses when the formula requires more than one polyatomic requires more than one polyatomic

ionion..

Common polyatomic ions.Common polyatomic ions.

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium

hydroxidehydroxide

carbonatecarbonate

nitratenitrate

sulfatesulfate

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide

carbonatecarbonate

nitratenitrate

sulfatesulfate

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate

nitratenitrate

sulfatesulfate

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate

sulfatesulfate

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate NONO33--

sulfatesulfate

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate NONO33--

sulfatesulfate SOSO442-2-

hydrogen carbonatehydrogen carbonate

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate NONO33--

sulfatesulfate SOSO442-2-

hydrogen carbonatehydrogen carbonate HCOHCO33--

hydrogen sulfatehydrogen sulfate

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate NONO33--

sulfatesulfate SOSO442-2-

hydrogen carbonatehydrogen carbonate HCOHCO33--

hydrogen sulfatehydrogen sulfate HSOHSO44--

phosphate phosphate

Name (ion)Name (ion) Chemical FormulaChemical Formula

ammoniumammonium NHNH44++

hydroxidehydroxide OHOH--

carbonatecarbonate COCO332-2-

nitratenitrate NONO33--

sulfatesulfate SOSO442-2-

hydrogen carbonatehydrogen carbonate HCOHCO33--

hydrogen sulfatehydrogen sulfate HSOHSO44--

phosphate phosphate POPO443-3-

Write the formulas of the following:

ammonium ammonium sulfidesulfide

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2-

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2- (NH(NH44))22SS

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2- (NH(NH44))22SS

CuCu+ + COCO33--

CuCu2+ 2+ COCO332-2-

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2- (NH(NH44))22SS

copper(II) copper(II) carbonatecarbonate

CuCu+ + COCO33--

CuCu2+ 2+ COCO332-2-

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2- (NH(NH44))22SS

copper(II) copper(II) carbonatecarbonate

oror

CuCu+ + COCO33--

CuCu2+ 2+ COCO332-2-

CuCOCuCO33

Write the formulas of the following:

ammonium ammonium sulfidesulfide

NHNH44+ + SS2-2- (NH(NH44))22SS

copper(II) copper(II) carbonatecarbonate

oror

cupric cupric carbonatecarbonate

CuCu+ + COCO33--

CuCu2+ 2+ COCO332-2-

CuCOCuCO33

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