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Introductory Chemistry: A Foundati...

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

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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46. What mass of the indicated solute does each of the following solutions contain?

a. 17.8 mL of 0.119 M CaCl2

b. 27.6 mL of 0.288 M KCl

c. 35.4 mL of 0.399 M FeCl3

d. 46.1 mL of 0.559 M KNO3

Interpretation Introduction

(a)

Interpretation:

The mass of the indicated solute in the given solution is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

Explanation

It is given that 17.8mL of 0.119M

CaCl2 solution is prepared.

The conversion of units of volume into L is done as,

17.8mL=17.81000L=0.0178L

The molar mass of CaCl2 is 110.98g/mol.

The number of moles of a solute is calculated by the formula,

Numberofmolesofsolute=Volumeofsolution×Molarity

Substitute the values of volume of solution and molarity of CaCl2 solution in the above expression.

Numberofmolesofsolute=0

Interpretation Introduction

(b)

Interpretation:

The mass of the indicated solute in the given solution is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteLitersofsolution.

Interpretation Introduction

(c)

Interpretation:

The mass of the indicated solute in the given solution is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteLitersofsolution.

Interpretation Introduction

(d)

Interpretation:

The mass of the indicated solute in the given solution is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteLitersofsolution.

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