2. A student was required to make a solution of camphor and naphthalene that had a freezing point of 166 C. How many grams of naphthalene (CjoHs) need to be added to 10.0 g of camphor to make this solution? The freezing point of pure camphor is 178.4°C and the freezing point depression constant for camphor, Kf, is 37.7°C/m. 3. The freezing point of biphenyl (molar mass 154 g/mole) is 71.0°C. When 1.240 g of benzophenone (molar mass 182 g/mole) is added to 9.52 g of biphenyl the solution is found to freeze at 14.3°C. Calculate the freezing point depression constant, Ks, for biphenyl. 4. You are given a vial with an unknown compound. You are told that it is a sodium halide compound. You need to determine the identity of the halide. When 1.57 g of NaX is added to 39.2 g of distilled water, the resulting solution was cooled and the freezing point was determined to be -1.45°C. What is the identity of X? (Assume the freezing point of the distilled water is 0.00°C.) 140

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
Question
2.
A student was required to make a solution of camphor and naphthalene that had a
freezing point of 166 C. How many grams of naphthalene (CjoHs) need to be added
to 10.0 g of camphor to make this solution? The freezing point of pure camphor is
178.4°C and the freezing point depression constant for camphor, Kf, is 37.7°C/m.
3. The freezing point of biphenyl (molar mass 154 g/mole) is 71.0°C. When 1.240 g of
benzophenone (molar mass 182 g/mole) is added to 9.52 g of biphenyl the solution is
found to freeze at 14.3°C. Calculate the freezing point depression constant, Ks, for
biphenyl.
4. You are given a vial with an unknown compound. You are told that it is a sodium halide
compound. You need to determine the identity of the halide. When 1.57 g of NaX is added
to 39.2 g of distilled water, the resulting solution was cooled and the freezing point was
determined to be -1.45°C. What is the identity of X? (Assume the freezing point of the
distilled water is 0.00°C.)
140
Transcribed Image Text:2. A student was required to make a solution of camphor and naphthalene that had a freezing point of 166 C. How many grams of naphthalene (CjoHs) need to be added to 10.0 g of camphor to make this solution? The freezing point of pure camphor is 178.4°C and the freezing point depression constant for camphor, Kf, is 37.7°C/m. 3. The freezing point of biphenyl (molar mass 154 g/mole) is 71.0°C. When 1.240 g of benzophenone (molar mass 182 g/mole) is added to 9.52 g of biphenyl the solution is found to freeze at 14.3°C. Calculate the freezing point depression constant, Ks, for biphenyl. 4. You are given a vial with an unknown compound. You are told that it is a sodium halide compound. You need to determine the identity of the halide. When 1.57 g of NaX is added to 39.2 g of distilled water, the resulting solution was cooled and the freezing point was determined to be -1.45°C. What is the identity of X? (Assume the freezing point of the distilled water is 0.00°C.) 140
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY