9C 1 part D

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curry 1E
Posts: 55
Joined: Wed Sep 18, 2019 12:15 am

9C 1 part D

Postby curry 1E » Mon Dec 02, 2019 12:29 pm

Can someone help me with 9C.1 part D? how do you know charge of SO4?

Rachel Yu 1G
Posts: 113
Joined: Fri Aug 09, 2019 12:15 am

Re: 9C 1 part D

Postby Rachel Yu 1G » Mon Dec 02, 2019 12:41 pm

If you draw out the Lewis structure, you can see that the formal charges on oxygen result in a 2- charge. In the context of the question, there is a table in the book listing charges of various molecules like SO4 2- or NH4+. I think it is something we need to memorize.

Sam McNeill 1E
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

Re: 9C 1 part D

Postby Sam McNeill 1E » Mon Dec 02, 2019 4:18 pm

The chart that is posted on the class website lists the compounds and their charges that we need to know.

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