Coming up with formula from name

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Emma Randolph 1J
Posts: 65
Joined: Fri Sep 28, 2018 12:29 am

Coming up with formula from name

Postby Emma Randolph 1J » Mon Dec 03, 2018 11:35 pm

When coming up with the formula for a compund from its name, how do you know where to place the elements? For example, in exercise 3b in 9C of the 7th edition, the name of the compound is pentaamminesulfatocobalt (III) chloride. How do we know that means [Co(NH3)5(SO4)]Cl and not (NH3)5(SO4)CoCl ?

Sydney Aurelio_Dis4B
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Coming up with formula from name

Postby Sydney Aurelio_Dis4B » Mon Dec 03, 2018 11:43 pm

The order for writing formulas from name is 1.) Metal 2.) Anionic Molecule (in alphabetical order) 3.) Neutral molecule

Searra Harding 4I
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Re: Coming up with formula from name

Postby Searra Harding 4I » Tue Dec 04, 2018 12:43 am

Consult the table on page 723 (7th edition) named toolbox 9C.1. It has all the helpful tips.

Catherine Kim 3K
Posts: 31
Joined: Fri Sep 28, 2018 12:26 am

Re: Coming up with formula from name

Postby Catherine Kim 3K » Tue Dec 04, 2018 12:57 pm

The formula [symbols] should be alphabetical and you put metal at the beginning. The neutral molecule should be at the end. You need the brackets to show the charge.


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