Which is FALSE about formal charges and resonance forms?
1. The sum of the formal charges can vary from one valid
resonance structure to another.
2. The formal charge on a given atom need not be the same from
one resonance form to another
3. The sum of the formal charges needs to be the same as the
overall charge of the molecule/ion.
4. The sum of the formal charges of one resonance structure has
to be the same as...
1. Draw the possible resonance
structures for [S2CN(CH3)2]- and assign formal charges. Indicate
which resonance structure provides the best description for the ion
and why?
2. Predict and draw the Lewis dot
structures for the following compounds. Include a description of
distortion from ideal geometry and why.
a) [IF3]2-
b) XeO2F2
3. Predict the order of solubility in
water for the following series, and explain the factors
involved.
PbCl2 PbBr2 PbBI2 PbS
4. Draw all isomers for the compound
[Cr(H2O)3Br(Cl)(I)]...
Based on formal charges, draw the most preferred Lewis structure for ClO3-?
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include lone pairs of electrons an formal charges.
1) draw the most appropriate Lewis structure, 2) all resonance
structures, and 3) formal charges for all atoms having any. Then,
determine the electron and molecular geometries for each
structure.
?????
VAL:
STAB:
BOND:
LONE:
BP:
LP:
Lewis
Structure:
VESPR:
steric
number (# e-‐ pairs): electron pair geometry:
# lone pairs: molecular geometry:
Lewis Structure Drawn with Molecular Geometry:
Be STAB:
Rule Exception: Formal Charges
Write two resonance structures of
C3H3− ion. Mention the
formal charge of each atom.
A covalent bond has 3.15% ionic character. If the experimental
value of the dipole moment were found to be 0.22 D, what would be
the length of the covalent bond in picometer?