Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 13 Solutions and Their Behavior - Study Questions - Page 505a: 25

Answer

$34.99\ mmHg$

Work Step by Step

Number of moles of ethylene glycol: $35.0\ g\div62.07\ g/mol=0.564\ mol$ Number of moles of water: $500\ g\div 18.015\ g/mol=27.754\ mol$ Mole fraction of solvent: $27.754/(27.754+0.564)=0.98$ Vapor pressure of water: $P=XP^0=0.98\times35.7\ mmHg=34.99\ mmHg$
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