Polyatomic Ions/Naming Compounds

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Ariel Fern 2B
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Joined: Fri Aug 30, 2019 12:17 am

Polyatomic Ions/Naming Compounds

Postby Ariel Fern 2B » Sun Oct 06, 2019 9:52 am

On several problems (E9 - Magnesium Sulfate Heptahydrate, F3 - Nitric Acid, as well as many compounds in H), there are ionic compounds with polyatomic ions within them. Do you have any tips to memorizing the charges and elements in these ions? I have flash cards from high school chem, but I was wondering if there are any other ways to recognize these compounds before I take to the flash cards again. Thanks!

Joowon Seo 3A
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Re: Polyatomic Ions/Naming Compounds

Postby Joowon Seo 3A » Sun Oct 06, 2019 11:08 am

I recommend putting them into groups and recognizing the patterns in the prefixes and the charges. Hypochlorite, Chlorite, Chlorate, and Perchlorate all have charges of -1. Polyatomic ions that start with hypo- and end with -ite have one oxygen atom. Polyatomic ions that just end in -ite have 2 oxygen atoms, and so on. I hope this helps.

SimranSangha4I
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Joined: Sat Sep 14, 2019 12:17 am

Re: Polyatomic Ions/Naming Compounds

Postby SimranSangha4I » Sun Oct 06, 2019 11:23 am

The way I had memorized them in high school was organizing them by the suffixes of the compounds like -ite, -ate, and -ide! (i.e. AgNO3 - Silver nitrate) Hope this helped!

ZevMarx-Kahn3C
Posts: 52
Joined: Sat Aug 17, 2019 12:17 am

Re: Polyatomic Ions/Naming Compounds

Postby ZevMarx-Kahn3C » Mon Oct 07, 2019 7:35 pm

Do we have to know this stuff for the first test?

Sreyes_1C
Posts: 90
Joined: Fri Sep 28, 2018 12:19 am

Re: Polyatomic Ions/Naming Compounds

Postby Sreyes_1C » Mon Oct 07, 2019 11:57 pm

705327693 wrote:Do we have to know this stuff for the first test?

I would like to assume it wouldn't be directly tested on the first test but more than likely it would be necessary later on in the course

Jamie Hwang 2F
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Joined: Thu Jul 25, 2019 12:16 am

Re: Polyatomic Ions/Naming Compounds

Postby Jamie Hwang 2F » Thu Oct 10, 2019 12:29 am

From what I've heard, from my TA and Step-Up, we don't need to know how to name the more difficult compounds but we should know common/simple ones like salt and water.

serenabirkhoff_1K
Posts: 63
Joined: Sat Aug 17, 2019 12:15 am

Re: Polyatomic Ions/Naming Compounds

Postby serenabirkhoff_1K » Sun Oct 13, 2019 12:52 pm

Will we ever have to know the polyatomic ions or always just the simple ones like water and carbon dioxide?


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