Common Ions and Formula Units

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Vocabulary flashcards mapping common polyatomic ions, formula units, and aqueous acids to their formulas based on the lecture notes.

Last updated 3:38 PM on 8/31/26

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39 Terms

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Ammonium

A polyatomic ion with the formula $NH_4^{1+}$

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Hydronium

A polyatomic ion with the formula $H_3O^{1+}$

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Hydroxide

A polyatomic ion with the formula $OH^{1-}$

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Peroxide

A polyatomic ion with the formula $O_2^{2-}$

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Cyanide

A polyatomic ion with the formula $CN^{1-}$

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Nitrate

A polyatomic ion with the formula $NO_3^{1-}$

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Acetate

A polyatomic ion with the formula $CH_3COO^{1-}$

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Chlorate

A polyatomic ion with the formula $ClO_3^{1-}$

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Bromate

A polyatomic ion with the formula $BrO_3^{1-}$

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Iodate

A polyatomic ion with the formula $IO_3^{1-}$

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Sulfate

A polyatomic ion with the formula $SO_4^{2-}$

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Hydrogen sulfate or bisulfate

A polyatomic ion with the formula $HSO_4^{1-}$

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Carbonate

A polyatomic ion with the formula $CO_3^{2-}$

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Hydrogen carbonate or bicarbonate

A polyatomic ion with the formula $HCO_3^{1-}$

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Phosphate

A polyatomic ion with the formula $PO_4^{3-}$

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Hydrogen phosphate

A polyatomic ion with the formula $HPO_4^{2-}$

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Dihydrogen phosphate

A polyatomic ion with the formula $H_2PO_4^{1-}$

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Permanganate

A polyatomic ion with the formula $MnO_4^{1-}$

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Chromate

A polyatomic ion with the formula $CrO_4^{2-}$

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Dichromate

A polyatomic ion with the formula $Cr_2O_7^{2-}$

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Perchlorate

A polyatomic ion with the formula $ClO_4^{1-}$

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Hypochlorite

A polyatomic ion with the formula $ClO^{1-}$

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Ammonia

A formula unit with the chemical formula $NH_3$

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Water

A formula unit with the chemical formula $H_2O$

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Sodium hydroxide

A formula unit with the chemical formula $NaOH$

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Hydrogen peroxide

A formula unit with the chemical formula $H_2O_2$

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Hydrocyanic acid

An aqueous acid with the chemical formula $HCN_{(aq)}$

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Nitric acid

An aqueous acid with the chemical formula $HNO_{3(aq)}$

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Acetic acid

An aqueous acid with the chemical formula $HCH_3CO_{2(aq)}$

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Chloric acid

An aqueous acid with the chemical formula $HClO_{3(aq)}$

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Bromic acid

An aqueous acid with the chemical formula $HBrO_{3(aq)}$

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Iodic acid

An aqueous acid with the chemical formula $HIO_{3(aq)}$

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Sulfuric acid

An aqueous acid with the chemical formula $H_2SO_{4(aq)}$

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Carbonic acid

An aqueous acid with the chemical formula $H_2CO_{3(aq)}$

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Phosphoric acid

An aqueous acid with the chemical formula $H_3PO_{4(aq)}$

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Perchloric acid

An aqueous acid with the chemical formula $HClO_{4(aq)}$

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Hydrochloric acid

An aqueous acid with the chemical formula $HCl_{(aq)}$

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Hydrobromic acid

An aqueous acid with the chemical formula $HBr_{(aq)}$

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Hydroiodic acid

An aqueous acid with the chemical formula $HI_{(aq)}$