HW 10
REVIEW QUESTIONS
Chapter 10
- Write Lewis structure for each ionic compound shown below:
a) SrO
b) - Write the formula for the ionic compound formed from the combination of the elements indicated by the following Lewis symbols. (Note: formulas should be written in terms of X and Y and not actual elements, since their identity is not conclusively known).
а).
b)
c): - Draw Lewis structures and use VSEPR to predict the shape and bond angles and polarity for each of the following molecules or ions:
a)
Shape:
Bond angle:
Polarity (Y/N):
b)
Bond angle:
Polarity (Y/N):
b)
Shape:
Bond angle:
Polarity (Y/N):
c)
Bond angle:
Polarity (Y/N):
c)
Shape:
Bond angle:
Polarity (Y/N):
d)
Bond angle:
Polarity (Y/N):
d)
Shape:
Bond angle:
Polarity (Y/N):
4. Determine what is wrong with each Lewis structure shown below, and write the correct structure.
a)
b)
5. Classify each of the following bonds as ionic, polar covalent or non-polar covalent:
a)
b)
c)
6. Arrange the following bonds in order of increasing polarity:
I-I
Li-F
least polar
most polar
7. For each bond below, determine the direction of the dipole and indicate by labeling the atoms with
a)
b)
c) F- Cl
8. Shown below is the Lewis structure for acetaldehyde molecule. Predict the shape and the bond angle of the molecule at each point indicated:
carbon (*) shape:
bond angle:
carbon (**) shape:
bond angle:
9. Complete each of the following statements with a suitable word or phrase:
a) Polarity of a bond is caused by
b) Linear molecules with polar bonds are usually
c) Molecules with 3 bonding pairs and 1 non-bonding pair of electrons around the central atom have a
d) Bonds that have unequal sharing of electrons are classified as
e) Molecules with 2 bonding pairs and 2 non-bonding pair of electrons around the central atom have a
Bond angle:
Polarity (Y/N):
4. Determine what is wrong with each Lewis structure shown below, and write the correct structure.
a)
b)
5. Classify each of the following bonds as ionic, polar covalent or non-polar covalent:
a)
b)
c)
6. Arrange the following bonds in order of increasing polarity:
I-I
Li-F
least polar
most polar
7. For each bond below, determine the direction of the dipole and indicate by labeling the atoms with
a)
b)
c) F- Cl
8. Shown below is the Lewis structure for acetaldehyde molecule. Predict the shape and the bond angle of the molecule at each point indicated:
carbon (*) shape:
bond angle:
carbon (**) shape:
bond angle:
9. Complete each of the following statements with a suitable word or phrase:
a) Polarity of a bond is caused by
b) Linear molecules with polar bonds are usually
c) Molecules with 3 bonding pairs and 1 non-bonding pair of electrons around the central atom have a
d) Bonds that have unequal sharing of electrons are classified as
e) Molecules with 2 bonding pairs and 2 non-bonding pair of electrons around the central atom have a
ANSWERS:
- No answers provided
- a)
b) XY
c) - a) pyramidal;
; polar
b) bent; 109.5; polar
c) trigonal planar;; polar
d) linear;; non-polar - No answers provided
- a) polar covalent
b) ionic
c) non-polar covalent - No answers provided
- No answers provided
- carbon (*): tetrahedral;
carbon (**): trigonal planar; - No answers provided