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Naming ionic/ molecular compounds

Posted: Wed Oct 02, 2019 9:20 am
by Ali Polansky 1A
Hey does anyone have any tips on naming ionic/ molecular compounds? Some problems where we balance equations, it requires to write the formula from the word problem.

Re: Naming ionic/ molecular compounds

Posted: Wed Oct 02, 2019 9:29 am
by Sarah Zhari 1D
I think one way of naming ionic compounds is to look at the separate cations and anions, and then name those cations and anions accordingly. For example, KCl is potassium chloride, because it has a potassium cation and a chloride anion. In some cases, you might need to look at the charges of the cations and anions to decide the name, and in some cases, some metals can have variable oxidation states, such as iron (II) and iron (III).

Re: Naming ionic/ molecular compounds

Posted: Wed Oct 02, 2019 9:30 am
by Emma Popescu 1L
Our TA said we shouldn't worry about that until Chem 14B and that we will go over it later on

Re: Naming ionic/ molecular compounds

Posted: Wed Oct 02, 2019 11:44 pm
by Aadil Rehan 1D
While I'm fairly sure we won't have to worry about that for most of 14A, might be a good call to take a look at some lists of polyatomic ions online and start to memorize them - it makes a lot of problems a lot quicker. I also like to make dumb mnemonics: for example: the carbonate ion is CO3, which I remember by thinking, "Oh, carbon ate 3 meals" - hence, CO3. Honestly, just seeing it over and over helps cement them.

Re: Naming ionic/ molecular compounds

Posted: Thu Oct 03, 2019 11:48 am
by Eesha Sohail 1D
If anyone is looking for a good list of inorganic naming conventions, I found this one very helpful, as it organizes ions by charge and groups together similar polyatomic ions, including the oxyanions:

http://msmcraesscience.weebly.com/uploa ... lature.pdf

Hope this helps someone!

Re: Naming ionic/ molecular compounds

Posted: Thu Oct 03, 2019 12:03 pm
by Tai Metzger 3K
I also had a question relating to this. What exactly are the roman numerals after some metals and when do we need to use them?

Re: Naming ionic/ molecular compounds

Posted: Thu Oct 03, 2019 12:46 pm
by Astrid Lunde 1I
Tai Metzger 3K wrote:I also had a question relating to this. What exactly are the roman numerals after some metals and when do we need to use them?


The roman numerals after some metals refers to the number of valence electrons of the particular metal ion.

Re: Naming ionic/ molecular compound

Posted: Thu Oct 03, 2019 2:25 pm
by Rohan Kubba Dis 4B
In the periodic table, there are elements (mainly from groups 3-12) that have variable amounts of electrons present. In this case the difference between Iron (II) (ferrous) and Iron (III) (ferric) is that in iron (II), the iron atom has lost two electrons to form Iron (II) and in iron (III) the iron atom has lost three electrons to form iron (III).