   Chapter 15, Problem 5ALQ ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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# m>5. Which of the following do you need to know to calculate the molarity of a salt solution? (There may be more than one answer.) the mass of salt added the molar mass of the salt the volume of water added the total volume of the solution plain your answer.

Interpretation Introduction

Interpretation:

The correct options corresponding to the given statements are to be stated.

Concept Introduction:

There are many ways to determine the concentration of the solution. One of the most used methods is molarity. Molarity may be defined as the number of moles of the solute in one liter of the whole solution. Thus, the molarity can be calculated as:

M=molesofsolutemoletotalvolumeofsolutionL.

Explanation

Reason for correct option:

a. The formula for the calculation of molarity is:

M=molesofsolutemoletotalvolumeofsolutionL

The calculation of the number of moles is as follows:

Numberofmoles=Givenmassmolarmass

To calculate the molarity of the solution, the number of moles of solute in the solution is required and to calculate the number of moles, the mass of the solute is required.

Hence, the mass of salt added must be known to calculate the molarity.

b. The formula for the calculation of molarity is:

M=molesofsolutemoletotalvolumeofsolutionL

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