NAME:
PERIOD:
HOMEWORK 10.6
a. Review yow- notes .
b. Answer the following:
1. Determine the new boiling point of a solution after 12.0g of glucose (C6HI206) has been added to 50.0g of
water. Glucose is a nonvolatile, covalent compound.
K, of water = 0.512 DC/m
Mt~
C~1~/2 0& ~
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OJ
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e~liz ()&
/2"0 .IK
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c. fie.. 0,
z:
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2. Determme the freezmg pomt of a 0.586m solution of water
compound.
Kf of ethanol = 1.990C/m
6 I
P :: C.
~
f.p. of ethanol
58'&) ({)
"
=
ill
(1.33)
ethanol. Water
IS
1.33
J (. $12.)::
f:¥>
$0
•
",3~
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7 de
[100.
a nonvolatt e, covalen
-114.1 °c
(l,qq)
((P~fC.J
3. Determine the freezing point and boiling point of a l.26m solution of naphthalene (CIOHs) in benzene.
Naphthalene is a nonvolatile, covalent compound.
K, benzene
= 2.53
b.p. benzene
°C/m
= 80.1 DC
Kf benzene = 5.12°C/m
f.p. benzene
=
5.50DC
4. A rock salt (NaCl), ice and water mixture is used to cool milk and cream when making homemade ice
cream. Determine the mass (in grams) of rock salt needed to lower the freezing point of water 10.0°C.
Kr water
=
1.86oC/m
/0
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