CHEM 219 LAB EXAMS 5 TO 8 FULL SOLUTION
STUDY GUIDE
◉ The molecular formula for the simple alkane butane is:
Answer: C4H10
◉ Now, consider the structure of cyclobutane. The molecular
formula of cyclobutane is:
Answer: C4H8
◉ What changed between the butane and cyclobutane structures?
Answer: The loss of 2 hydrogen atoms
◉ A polymer is a macromolecule made of many repeated subunits,
known as monomers.
Answer: Polymers can be natural, such as proteins, or synthetic,
such as plastics.
◉ A polymer formed as monomers link together without forming a
byproduct.
Answer: Addition Polymer
,◉ A polymer formed as monomers link together, forming a small
molecule as a byproduct.
Answer: Condensation Polymer
◉ A rigid polymer used often in construction materials. The
structure contains a halogen.
Answer: Polyvinyl chloride
◉ A flexible polymer used in the manufacturing of grocery bags. The
molecular structure is
(C2H4)n(CX2HX4)n
.
Answer: High-density polyethylene
◉ A polymer produced through a condensation reaction, with
applications ranging from clothing to packaging.
Answer: Polyethylene terephthalate
◉ A rigid, brittle polymer used in disposable food containers. The
backbone of the polymer contains phenyl rings.
Answer: Polystyrene
◉ Polypropylene is a polymer with a density of 0.89 g/mL.
, Review the density table given and identify the expected
observations if polypropylene is added to a beaker containing each
liquid.
Liquid Density (g/mL)
water1.00
methanol 0.79
ethanol 0.79
hexane 0.66
Answer: Polypropylene will sink in ethanol.
Polypropylene will float in water.
◉ In general, alcohols dissolve when mixed with water because the
O-H bonds in alcohols can hydrogen bond with water.
Answer:
◉ Which is NOT a good source of information about the hazards that
affect waste disposal in a chemistry lab?
Answer: your lab partner
◉ Use glass containers, unless instructed to do otherwise.
Answer: Many organic chemicals dissolve plastics.
◉ Do not use open flames, like Bunsen burners.
STUDY GUIDE
◉ The molecular formula for the simple alkane butane is:
Answer: C4H10
◉ Now, consider the structure of cyclobutane. The molecular
formula of cyclobutane is:
Answer: C4H8
◉ What changed between the butane and cyclobutane structures?
Answer: The loss of 2 hydrogen atoms
◉ A polymer is a macromolecule made of many repeated subunits,
known as monomers.
Answer: Polymers can be natural, such as proteins, or synthetic,
such as plastics.
◉ A polymer formed as monomers link together without forming a
byproduct.
Answer: Addition Polymer
,◉ A polymer formed as monomers link together, forming a small
molecule as a byproduct.
Answer: Condensation Polymer
◉ A rigid polymer used often in construction materials. The
structure contains a halogen.
Answer: Polyvinyl chloride
◉ A flexible polymer used in the manufacturing of grocery bags. The
molecular structure is
(C2H4)n(CX2HX4)n
.
Answer: High-density polyethylene
◉ A polymer produced through a condensation reaction, with
applications ranging from clothing to packaging.
Answer: Polyethylene terephthalate
◉ A rigid, brittle polymer used in disposable food containers. The
backbone of the polymer contains phenyl rings.
Answer: Polystyrene
◉ Polypropylene is a polymer with a density of 0.89 g/mL.
, Review the density table given and identify the expected
observations if polypropylene is added to a beaker containing each
liquid.
Liquid Density (g/mL)
water1.00
methanol 0.79
ethanol 0.79
hexane 0.66
Answer: Polypropylene will sink in ethanol.
Polypropylene will float in water.
◉ In general, alcohols dissolve when mixed with water because the
O-H bonds in alcohols can hydrogen bond with water.
Answer:
◉ Which is NOT a good source of information about the hazards that
affect waste disposal in a chemistry lab?
Answer: your lab partner
◉ Use glass containers, unless instructed to do otherwise.
Answer: Many organic chemicals dissolve plastics.
◉ Do not use open flames, like Bunsen burners.
