Common Polyatomic Ions

[Slumber]

So... I was doing the DAT Bootcamp GC exam, and it struck me that I don't know all the common polyatomic ions. One of the problem asked something about Sodium Chromate and I honestly don't know its molecular formula. Do I need to memorize all the polyatomic ions?

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[IsaacYankem]

SO42- sulfate
SO32- sulfite
NO3- nitrate
NO2- nitrite
PO43- phosphate
CO32- carbonate
HCO3- bicarbonate
OH- hydroxide
MnO4- permanganate

ClO- hypochlorite
ClO2- chlorite
ClO3- chlorate
ClO4- perchlorate

CrO42- chromate
Cr2O72- dichromate
NH4+ ammonium
CN- cyanide

 

[biomolecmed]

Yes. You must know all ions. Isaac Yankem did a great job of listing all the polyatomic iojs that you need to know.