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 505: 1

Answer

Mass of Succinic Acid =2.56g Mass of solvent in ml = 500ml (1kg =1L) molality = ? mole fraction = ? weight percentage of acid = ? solution: moles of Succinic Acid = mass / Molar mass = 2.56/116 0.022 mol /dm3 Moles of water = Mass / molar mass =500/18 =27.7mol/dm3 molality = moles of solute/mass of solution in Kg = 0.022/0.5 = 0.044 mol/kg Mole fraction = n1/n1+n2 =0.022/ 0.022+27.7 = 0.022/27.72 7.936*10^-4 Weight percentage of acid = mass of solute/mass of solution*100 =2.56/(2.56+500) *100 = 2.56/502.56*100 =0.59

Work Step by Step

Mass of Succinic Acid =2.56g Mass of solvent in ml = 500ml (1kg =1L) molality = ? mole fraction = ? weight percentage of acid = ? solution: moles of Succinic Acid = mass / Molar mass = 2.56/116 0.022 mol /dm3 Moles of water = Mass / molar mass =500/18 =27.7mol/dm3 molality = moles of solute/mass of solution in Kg = 0.022/0.5 = 0.044 mol/kg Mole fraction = n1/n1+n2 =0.022/ 0.022+27.7 = 0.022/27.72 7.936*10^-4 Weight percentage of acid = mass of solute/mass of solution*100 =2.56/(2.56+500) *100 = 2.56/502.56*100 =0.59
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