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: 26

Answer

$17.64\ mmHg$

Work Step by Step

Number of moles of urea: $9.0\ g\div 60.06\ g/mol=0.15\ mol$ Number of moles of water: $10\ mL\times 1.0\ g/mL\div 18.015\ g/mol=0.555\ mol$ Mole fraction of solvent: $0.555/(0.555+0.15)=0.787$ Vapor pressure of water: $P=XP^0=0.787\times 22.4\ mmHg=17.64\ mmHg$
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