   Chapter 15, Problem 34CR ### 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
8 views

# 34. Calculate the indicated quantity for each solution. a. The percent by mass of solute when 2.05 g of NaCl is dissolved in 19.2 g of water. b. The mass of solute contained in 26.2 g of 10.5% CaCI2 solution. c. The mass of NaC1 required to prepare 225 g of 5.05% NaCl solution.

Interpretation Introduction

(a)

Interpretation:

The mass percentage of NaCl in the given solution is to be calculated.

Concept Introduction:

The mass percentage of a compound present in a solution is calculated by dividing the mass of the compound present in the solution by the total mass of the solution and then multiplying it by 100. The formula for mass percentage is represented as:

mass%=MMt×100%

Where,

• M represents the mass of the compound present in the solution.
• Mt represents the total mass of solution.
Explanation

The mass of NaCl present in solution is 2.05g.

The mass of water added in NaCl is 19.2g.

The total volume solution is given as:

Mt=Ms+Mw

Where,

• Ms represents the mass of the solute.
• Mw represents the mass of water.

Substitute the value of mass of NaCl and mass of water in above equation.

Mt=2.05g+19.2g=21

Interpretation Introduction

(b)

Interpretation:

The mass of CaCl2 present in the given solution is to be calculated.

Concept Introduction:

The mass percentage of a compound present in a solution is calculated by dividing the mass of the compound present in the solution by the total mass of the solution and then multiplying it by 100. The formula for mass percentage is represented as:

mass%=MMt×100%

Where,

• M represents the mass of the compound present in the solution.
• Mt represents the total mass of solution.
Interpretation Introduction

(c)

Interpretation:

The mass of NaCl required to prepare given solution is to be calculated.

Concept Introduction:

The mass percentage of a compound present in a solution is calculated by dividing the mass of the compound present in the solution by the total mass of the solution and then multiplying it by 100. The formula for mass percentage is represented as:

mass%=MMt×100%

Where,

• M represents the mass of the compound present in the solution.
• Mt represents the total mass of solution.

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