AP Chemistry – Polyatomic Ions Flashcards

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Exercise And Fitness – Reflection From November 10, 2025

AP Chemistry – Polyatomic Ions Flashcards

One of the concepts that is frequently tested on the AP Chemistry exam is the section about polyatomic ions.

I think it would be beneficial to a student to memorize common polyatomic ions. I created these flashcards to help students memorize these polyatomic ions. Please take a look below.

[qdeck]
[q] Ammonium [a] NH4 +

[q] Hydronium [a] H3O +

[q] Peroxide [a] O2 2−

[q] Hydroxide [a] OH −

[q] Acetate [a] CH3COO−

[q] Cyanide [a] CN

[q] Azide [a] N3 −

[q] Carbonate [a] CO3 2−

[q] Bicarbonate [a] HCO3 −

[q] Nitrate [a] NO3 −

[q] Nitrite [a] NO2 −

[q] Sulfate [a] SO4 2−

[q] Hydrogen Sulfate [a] HSO4 −

[q] Sulfite [a] SO3 2−

[q] Hydrogen Sulfite [a] HSO3 −

[q] Phosphate [a] PO4 3−

[q] Hydrogen Phosphate [a] HPO4 2−

[q] Dihydrogen Phosphate [a] H2PO4 −

[q] Perchlorate [a] ClO4 −

[q] Chlorate [a] ClO3 −

[q] Chlorite [a] ClO2 −

[q] Hypochlorite [a] ClO

[q] Chromate [a] CrO4 2−

[q] Dichromate [a] Cr2O7 2−

[q] Permanganate [a] MnO4 −

[q] Acetic Acid [a] CH3COOH

[q] Hydrocyanic Acid [a] HCN

[q] Hydrazoic Acid [a] HN3

[q] Carbonic Acid [a] H2CO3

[q] Nitric Acid [a] HNO3

[q] Nitrous Acid [a] HNO2

[q] Sulfuric Acid [a] H2SO4

[q] Sulfurous Acid [a] H2SO3

[q] Phosphoric Acid [a] H3PO4

[q] Perchloric Acid [a] HClO4

[q] Chloric Acid [a] HClO3

[q] Chlorous Acid [a] HClO2

[q] Hypochlorous Acid [a] HClO

[q] Chromic Acid [a] H2CrO4

[q] Dichromic Acid [a] H2Cr2O7

[q] Permanganic Acid [a] HMnO4


[/qdeck]

I might turn this into iPhone and Android apps in the future to help students learn. Best of luck with studying. 😃

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