Charges of Common Polyatomic Ions
1+
*Ammonium / NH41+ / 2+
*Mercury (I) / Hg22+
1-
*Acetate
*Bromate
*Chlorate
*Cyanide
*Hydroxide
*Iodate
*Nitrate
*Permanganate
*Thiocyanate / C2H3O21-
BrO31-
ClO31-
CN1-
OH1-
IO31-
NO31-
MnO41-
SCN1- / 2-
*Carbonate
*Chromate
*Dichromate
*Oxalate
*Peroxide
Selenate
Silicate
*Sulfate
Thiosulfate / CO32-
CrO42-
Cr2O72-
C2O42-
O22-
SeO42-
SiO32-
SO42-
S2O32-
3-
*Arsenate
*Borate
Citrate
Hexacyanoferrate (III)
*Phosphate / AsO43-
BO33-
C6H5O73-
Fe(CN)63-
PO43- / 4-
Hexacyanoferrate (II) / Fe(CN)64-
Determining the Ion or Acid – A Polyatomic Approach
Polyatomic Anion / Acid / Examples
per______ate ion / ­ Gains 1 Oxygen / per______ic acid / perchlorate ion
ClO4-1
perchloric acid
This is your starting point. It is all based off of the “-ate” ion ® / ______ate ion / ______ic acid / chlorate ion
ClO3-1
chloric acid
______ite ion / ¯ Loses 1 Oxygen / ______ous acid / chlorite ion
ClO2-1
chlorous acid
All the polyatomic ions in the group will have the exact same charge. / hypo______ite ion / ¯ Loses 1 Oxygen / hypo______ous acid / hypochlorite ion
ClO1-1
hypochlorous acid
They only have a different number of oxygen (and name) / ______ide ion / * Has no oxygen (Just an element from the periodic table) / hydro______ic acid / chloride ion
Cl-1
hydrochloric acid

Hey There AP Chemistry Students!

School starts on Thursday, August 17. Your summer assignment is to come to school prepared to take a test on Friday, August 18. The test will be comprised of 3 parts. Part A will be a test over the polyatomic ions. I have marked the polyatomic ions (*) you must know for Part A. You will not be allowed to use a polyatomic ion chart throughout AP Chemistry. You will also need to be able to determine a polyatomic ion that is a variation of an “-ate” ion. The highlighted ions are the ones that you need to be able to name the various forms for: ex. perchlorate ion – ClO4-1, chlorate ion – ClO3-1, chlorite ion – ClO2-1, hypochlorite ion – ClO1-1.

Part B will be a test over naming compounds and writing formulas. You should be able to name and write formulas for metal and transition metal compounds, covalently bonded compounds, acids, and hydrates. A naming packet with a breakdown of the rules, and examples for each individual type of compound as well as mixed practice can be found on my website: http://sites.google.com/a/yukonps.com/travis-black. The information can be found under the AP Chemistry – Summer Assignment tab on the left side of the page.

Part C will be a test over molar conversions. You should be able to convert the mass of compound into moles of the compound and convert moles of a compound into its mass. You should also be able to determine the molar mass of a substance using a periodic table. The table that I will use throughout my class is on my website, under the AP Chemistry – Summer Assignment tab. You will also find practice problems and notes there to help you practice.

I hope you have a great summer. See you in the fall.

Mr. Black and Mrs. Mowery

S201 and S213 (if you have any questions)