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7th edition 2b9

Posted: Thu Nov 01, 2018 8:49 pm
by Jasmin Argueta 1K
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!

Re: 7th edition 2b9

Posted: Thu Nov 01, 2018 8:56 pm
by Amy Lefley 1J
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.

Re: 7th edition 2b9

Posted: Thu Nov 01, 2018 9:04 pm
by Jasmin Argueta 1K
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

Re: 7th edition 2b9

Posted: Thu Nov 01, 2018 10:18 pm
by Nawaphan Watanasirisuk 3B
I also want to know if we were expected to know the chemical formula when given a less obvious compound name like ammonium chloride?