Question

For a molecule of fluorous acid, the atoms are arranged as HOFO. (Note: In this oxyacid, the placement of fluorine is an exception to the rule of putting the more electronegative atom in a terminal position.)What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed.Express your answers as charges separated by comma. For example, a positive one charge would be written as +1.Formal Charge for H, O, F, O =_______.

Answer 1

Answer:

0,0,0,0

Explanation:

The formal charge formula:

$Formal charge= Valence electrons - lone pair electrons - 0.5 shared electrons$

So:

Hydrogen: 1 elec. of valence and shares two electrons with the O

$Formal charge= 1 - 0 - 0.5*2=0$

Oxygen: 6 elec. of valence, 2 lone pairs and shares two electrons with the H and two with the F

$Formal charge= 6 - 4 - 0.5*4=0$

Fluorine: 7 elec. of valence, 6 lone pairs and shares two electrons with the O

$Formal charge= 7 - 6 - 0.5*2=0$

Oxygen: 6 elec. of valence, 3 lone pairs

$Formal charge= 6 - 6 - 0.5*0=0$

Note: the dative bond between F and the second O doesn't count as shared electrons.