Naming Compounds

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Tinisha 1G
Posts: 69
Joined: Fri Sep 28, 2018 12:17 am

Naming Compounds

Postby Tinisha 1G » Mon Oct 01, 2018 3:46 pm

Is there a trick in knowing how to write out Calcium sulfide in molecular terms?

Duby3L
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Naming Compounds

Postby Duby3L » Mon Oct 01, 2018 4:00 pm

As to there being a short cut I'm not sure, but I would say memorizing the most common polyatomic ions.

AlyssaBei_1F
Posts: 99
Joined: Fri Sep 28, 2018 12:17 am

Re: Naming Compounds

Postby AlyssaBei_1F » Mon Oct 01, 2018 4:10 pm

Sadly there is no trick, the best way is to memorize.

Brian Hom 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Naming Compounds

Postby Brian Hom 2F » Mon Oct 01, 2018 4:25 pm

Calcium Sulfide is CaS. There is not really a trick to naming this since you should just look at the valence electrons and see how many calciums and sulfurs you need to fulfill the valence ring. You want the compound to have 8 valence electrons and no negative or positive charge for ionic bonds.

Leela_Mohan3L
Posts: 44
Joined: Fri Sep 28, 2018 12:26 am

Re: Naming Compounds

Postby Leela_Mohan3L » Mon Oct 01, 2018 6:43 pm

Calcium sulfide is an ionic compound. You know this because it consists of a cation (calcium) and an anion (sulfide). Calcium as a 2+ charge and sulfide has a 2- charge. An ionic compound must have a net charge of 0, therefore you get CaS.

Katelyn Phan 2A
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Naming Compounds

Postby Katelyn Phan 2A » Mon Oct 01, 2018 8:34 pm

With calcium sulfide and it's chemical notation, you could recognize the bond between the two elements. The -ide contributes to the fact that it is indeed an ionic compound. Calcium has a charge of +2 and sulfur has a charge of -2; therefore, the notation would be CaS. The quickest way to figure it out would be to memorize and recognize the charge and naming rules!

Vicky Lu 1L
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Naming Compounds

Postby Vicky Lu 1L » Mon Oct 01, 2018 10:17 pm

There is no trick to memorizing and knowing how to write in molecular terms for cases such as Calcium Sulfide. It is something to either study or pick up. I was say the best way to know the name of compounds would be to learn the common polyatomic ions in groups according to the patterns in their name.

michellebui_3L
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Naming Compounds

Postby michellebui_3L » Tue Oct 02, 2018 1:03 am

It's kind of something you just have to learn and get used to. It gets harder when it's a covalent bond, but I figured ionic bonds are easier to name.

Brian Chang 2H
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Naming Compounds

Postby Brian Chang 2H » Tue Oct 02, 2018 10:05 am

There is no trick to learning how to name compounds, however within organic and inorganic Chemistry the usual suspects will occur frequently such as Potassium Permanganate (KMnO4) and you should eventually be able to identify them with ease as long as you keep practicing!


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