7th edition 2b9

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Jasmin Argueta 1K
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7th edition 2b9

Postby Jasmin Argueta 1K » Thu Nov 01, 2018 8:49 pm

For problem 2B in the seventh edition I was wondering if we were suppose to know the formal charges of potassium and phosphorus just by being given the name of the compound? Do we figure that out through the name? If so, how? Thank you!

Amy Lefley 1J
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: 7th edition 2b9

Postby Amy Lefley 1J » Thu Nov 01, 2018 8:56 pm

To find the formal charge of an element, you use the equation V - (L+S/2) where V is the valence electrons, L is the lone electrons, and S is shared electrons.

Jasmin Argueta 1K
Posts: 69
Joined: Fri Sep 28, 2018 12:16 am

Re: 7th edition 2b9

Postby Jasmin Argueta 1K » Thu Nov 01, 2018 9:04 pm

But how would that be figured out just being told potassium phosphide? There's no lone electrons when only being given a name only a structure

Nawaphan Watanasirisuk 3B
Posts: 58
Joined: Tue Nov 28, 2017 3:03 am

Re: 7th edition 2b9

Postby Nawaphan Watanasirisuk 3B » Thu Nov 01, 2018 10:18 pm

I also want to know if we were expected to know the chemical formula when given a less obvious compound name like ammonium chloride?


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