Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074



Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

An aluminum-containing compound has the empirical formula (C2HS)2AIF. Find the molecular formula if 0.448 g of the compound dissolved in 23.46 g of benzene has a freezing point of 5.265 °C.

Interpretation Introduction

Interpretation: The molecular formula of the given aluminum compound to be identified.

Concept introduction:

Freezing point depression: The freezing point of the solution varies with the solute concentration.

Freezing point depression = ΔTfp= Kfp. msolute,where,Kfpismolal freezing point depression constant,msoluteis molality of solute


Given data:

Mass of solute = 0.448 g.Mass of Benzene  = 23.46 g = 0.0235 kgEmpirical formula is (C2H5)2AlF and the mass is104 g/molFreezing point=5.265oC

Freezing point depression = ΔTfp5.265oC - 5.50oC = - 0.235oC

Using the equation of freezing point depression, mass of the solute has to be calculated.

Known data:

Kfp (benzene) = - 5.12oC/m

Freezing point depression = ΔTfp= Kfp. msolute,msoluteΔTfpKfp =- 0.235oC- 5.12oC/m=0.046m

From the equation of molality, mass of solute can be determined.

Moles of solute (mol)  = (molality) (Amount of solvent(in kg))                                    = (0

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 13 Solutions

Show all chapter solutions add

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Just 3 ounces of salmon, a naturally rich source of vitamin D, provides most of an adult's daily need for vitam...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is motion?

An Introduction to Physical Science

How can you explain the Algol paradox?

Horizons: Exploring the Universe (MindTap Course List)

0 Which hexose is also known as “dextrose”?

Introduction to General, Organic and Biochemistry

What is blood plasma, and what is its function?

Human Biology (MindTap Course List)

A block weighing 40.0 N is suspended from a spring that has a force constant of 200 N/m. The system is undamped...

Physics for Scientists and Engineers, Technology Update (No access codes included)

What is the relationship between surface currents and the climate of adjacent continents?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin