Untitled - Kelly Walsh High School

186 CHEMISTRY FOR THE UTTERLY CONFUSED
8.
Molality a 50.0 g C2H5OH g
ba1000
250.0 g H2O 1kg ba1 mol C2H5OH 46.1 g C2H5OH b
4.34 m C 2 H 5 OH
9. P solution (1.000 0.250) (114 torr) (0.250) (197 torr) 135 torr
10. Tf iKfm (4) (1.86°C/m) (1.50 m) 11.2°C;
Tf (0.00 11.2)°C 11.2°C
Tb iKbm (4) (0.52°C/m) (1.50 m) 3.12°C;
Tb (100.00 3.12) 103.12°C
(0.195 torr) (0.0300 L) 1 atm
11.
a
L atm
760 torr
a0.0821 b (298.2 K)
mol K b 3.14 107 mol;
(6.95 10 3 g)
(3.14 10 7 mol) 2.21 104 g/mol