BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

Calculate the freezing point of 525 g of water that contains 25.0 g of NaCl. Assume i, the van’t Hoff factor, is 1.85 for NaCl.

Interpretation Introduction

Interpretation: The calculated freezing point of the NaCl solution has to be identified.

Concept introduction:

van’t Hoff factor, i: it is the ration between change in in freezing point measured and change in in freezing point calculated. It indicates the total number of ions that are produced.

van'tHofffactor,i=measuredΔTfpCalculatedΔTfp

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

  ΔTfp=Kfpmsolute

  where,

  Kfp is the molal freezing point depression constant.

Explanation

Given data:

i=1.85Massofwater(solvent)=525g=0.525kgMassofsolute(NaCl)=25.0gKfp(solventwater)  = -1.86oC/m

Molality can be calculated using the equation:

Molality = Moleofsolute(inmol)Amountofsolvent(inKg)

Molality = Moleofsolute(inmol)Amountofsolvent(inkg)=(25.0g/58.4g.mol-1)0.525kg=0.815m

Calculation of freezing point:

ΔTfp measured = Kfp.msolute=(-1.86oC/m)(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

In many people any kind of stress can cause overeating and weight gain T F

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

6.45 Define the term shielding.

Chemistry for Engineering Students

An energy-efficient lightbulb, taking in 28.0 W of power, can produce the same level of brightness as a convent...

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

Intensities being equal, which color of light moves farthest through seawater. Least far?

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