The freezing point of water is 0.00°C at 1 atmosphere. A student dissolves 10.56 grams of aluminum acetate, Al(CH3COO)3 (204.1 g/mol), in 247.4 grams of water. Use the table of boiling and freezing point constants to answer the questions below. K, CC/m) Kf CC/m) Solvent Formula Water H20 0.512 1.86 Ethanol CH;CH,OH 1.22 1.99 Chloroform CHC1; 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH;CH,OCH,CH3 2.02 The molality of the solution is m. The freezing point of the solution is °C.
The freezing point of water is 0.00°C at 1 atmosphere. A student dissolves 10.56 grams of aluminum acetate, Al(CH3COO)3 (204.1 g/mol), in 247.4 grams of water. Use the table of boiling and freezing point constants to answer the questions below. K, CC/m) Kf CC/m) Solvent Formula Water H20 0.512 1.86 Ethanol CH;CH,OH 1.22 1.99 Chloroform CHC1; 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH;CH,OCH,CH3 2.02 The molality of the solution is m. The freezing point of the solution is °C.
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
Related questions
Question
please explain
Transcribed Image Text:The freezing point of water is 0.00°C at 1 atmosphere.
A student dissolves 10.56 grams of aluminum acetate, Al(CH₃COO)₃ (204.1 g/mol), in 247.4 grams of water. Use the table of boiling and freezing point constants to answer the questions below.
| Solvent | Formula | \( K_b \) (°C/m) | \( K_f \) (°C/m) |
|---------------|-------------------|-----------------|-----------------|
| Water | H₂O | 0.512 | 1.86 |
| Ethanol | CH₃CH₂OH | 1.22 | 1.99 |
| Chloroform | CHCl₃ | 3.67 | --- |
| Benzene | C₆H₆ | 2.53 | 5.12 |
| Diethyl ether | CH₃CH₂OCH₂CH₃ | 2.02 | --- |
The molality of the solution is __________ m.
The freezing point of the solution is __________ °C.
Expert Solution
Step 1
molality = weight of solute*1000/gram molecular weight of solute* weight of solvent in g = 10.56*1000/(204.1*247.4) = 0.209m
Al(CH3COO)3 (aq) ----------> AI3+ (aq) + 3CH3C00-(aq)
i = 4
∆Tf = i*Kf*m
= 4*1.86*0.209= 1.55°C
∆Tf = Tf solvent - Tf solution
1.55= 0-Tf solution
Tf solution = -1.55°C
The freezing point of the solution = -1.55°C
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
ISBN:
9781305961135
Author:
Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:
Cengage Learning
Biochemistry
Biochemistry
ISBN:
9781305577206
Author:
Reginald H. Garrett, Charles M. Grisham
Publisher:
Cengage Learning
Fundamentals of General, Organic, and Biological …
Biochemistry
ISBN:
9780134015187
Author:
John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:
PEARSON