Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
9th Edition
ISBN: 9781337399425
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 6, Problem 43QAP
Interpretation Introduction

(a)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

2KO2(s)+2H2O(l)2KOH(aq)+O2(g)+H2O2(aq).

Explanation of Solution

The provided reaction is:

KO2(s)+H2O(l)KOH(aq)+O2(g)+H2O2(aq)

In the given equation if we place a coefficient of 2 before KO2 and coefficient 2 to theH2 O that is on the reactant side, and coefficient 2 is added on the product side of KOH, then the atoms are balanced with two potassium, six oxygen atom and four hydrogen atoms giving the balanced equation.

2KO2(s)+2H2O(l)2KOH(aq)+O2(g)+H2O2(aq) g.

Interpretation Introduction

(b)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

Fe2O3(s)+6HNO3(aq)2Fe(NO3)3(aq)+3H2O(l).

Explanation of Solution

The given unbalanced equation is:

Fe2O3(s)+HNO3(aq)Fe(NO3)3(aq)+H2O(l)

We start with elements of Fe(NO3)3. To balance Fe, we need to place coefficient 2 before Fe(NO3)3, coefficient 6 before HNO3 and coefficient 3 before H2 O. So we have six hydrogen atoms, two iron, six nitrogen and six hydrogen forming the balanced equation. Thus, the balanced chemical reaction is as follows:

Fe2O3(s)+6HNO3(aq)2Fe(NO3)3(aq)+3H2O(l).

Interpretation Introduction

(c)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

4NH3(g)+5O2(g)4NO(g)+6H2O(g).

Explanation of Solution

The given unbalanced equation is:

NH3(g)+O2(g)NO(g)+H2O(g)

We start by balancingNH3. If we place a coefficient 4 before NH3, coefficient5 before O2, coefficient 4 before NO and coefficient 6 before H2 O, then we have four nitrogen atoms, twelve hydrogen atoms, and ten oxygen atoms forming the balanced equation. Thus, the balanced chemical reaction will be as follows:

Interpretation Introduction

(d)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

PCl5(l)+4H2O(l)H3PO4(aq)+5HCl(g).

Explanation of Solution

The provided equation is:

PCl5(l)+H2O(l)H3PO4(aq)+HCl(g)

The most complicated molecule is H3PO4 because it contains the greatestnumber of elements. If we place a coefficient of 5 before HCl and 4 before H2 O, then we have one phosphorous atom, five chlorine atom, eight hydrogen atom and four oxygen atom giving the balanced equation. The equation balanced is given as,

PCl5(l)+4H2O(l)H3PO4(aq)+5HCl(g).

Interpretation Introduction

(e)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

C2H5OH(l)+3O2(g)2CO2(g)+3H2O(l).

Explanation of Solution

The provided equation is:

C2H5OH(l)+O2(g)CO2(g)+H2O(l)

The most complicated molecule is C2H5OH because it contains the greatestnumber of elements. We place a coefficient of 2 before CO2, 3 before H2 O and 3 before O2 that gives two atoms of carbon, six atoms of hydrogen, and seven atoms of oxygen to form the balanced equation. Thus, the balanced chemical reaction is as follows:

C2H5OH(l)+3O2(g)2CO2(g)+3H2O(l).

Interpretation Introduction

(f)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

2CaO(s)+5C(s)2CaC2(s)+CO2(g).

Explanation of Solution

The provided reaction is:

CaO(s)+C(s)CaC2(s)+CO2(g)

If we place a coefficient of 2 before CaO and CaC2 we get,

2CaO(s)+C(s)2CaC2(s)+CO2(g)

We place a coefficient of 5 before C. Now, we have a balanced equation.

2CaO(s)+5C(s)2CaC2(s)+CO2(g).

Interpretation Introduction

(g)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

2MoS2(s)+7O2(g)2MoO3(s)+4SO2(g).

Explanation of Solution

The provided reaction is:

MoS2(s)+O2(g)MoO3(s)+SO2(g)

If we place a coefficient of 4 before SO2 and 2 before MoS2, we get:

2MoS2(s)+O2(g)MoO3(s)+4SO2(g)

By placing a coefficient of 2 before MoO3 and 7 before O2, we have a balanced equation.

2MoS2(s)+7O2(g)2MoO3(s)+4SO2(g).

Interpretation Introduction

(h)

Interpretation:

The given chemical equation is to be balanced.

Concept Introduction:

In a balanced chemical reaction, the number of similar type of elements on both sides of the reaction is equal. To balance an unbalanced equation, the coefficients that are present before the compounds are changed but the subscripts in the formulas are not changed.

Expert Solution
Check Mark

Answer to Problem 43QAP

FeCO3(s)+H2CO3(aq)Fe(HCO3)2(aq).

Explanation of Solution

The provided reaction is:

FeCO3(s)+H2CO3(aq)Fe(HCO3)2(aq)

We see that all the atoms are balanced. Hence, we have a balanced equation.

FeCO3(s)+H2CO3(aq)Fe(HCO3)2(aq).

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Chapter 6 Solutions

Introductory Chemistry: A Foundation

Ch. 6 - Prob. 6ALQCh. 6 - Changing the subscripts of chemicals can...Ch. 6 - Table 6.1 lists some clues that a chemical...Ch. 6 - Use molecular-level drawings to show the...Ch. 6 - It is stated in Section 6.3 of the text that to...Ch. 6 - Prob. 11ALQCh. 6 - Consider the generic chemical equationaA+bBcC+dD...Ch. 6 - Prob. 13ALQCh. 6 - Which of the following correctly describes the...Ch. 6 - Which of the following correctly balances the...Ch. 6 - The reaction of an element X() with element Y() is...Ch. 6 - Prob. 1QAPCh. 6 - Prob. 2QAPCh. 6 - Although these days many people have...Ch. 6 - Prob. 4QAPCh. 6 - You have probably had the unpleasant experience of...Ch. 6 - If you’ve ever left bread in a toaster too long,...Ch. 6 - What are the substances to theleftof the arrow in...Ch. 6 - Prob. 8QAPCh. 6 - In a chemical reaction, the total number of atoms...Ch. 6 - Prob. 10QAPCh. 6 - Prob. 11QAPCh. 6 - The notation “(l)” after a substance’s formula...Ch. 6 - A common experiment to determine the relative...Ch. 6 - A common lecture demonstration called “elephant’s...Ch. 6 - If a sample of pure hydrogen gas is ignited very...Ch. 6 - Liquid hydrazine, has been used as a fuel for...Ch. 6 - If electricity of sufficient voltage is passed...Ch. 6 - Silver oxide may be decomposed by strong heating...Ch. 6 - Elemental boron is produced in one industrial...Ch. 6 - Many over-the-counter antacid tablets are now...Ch. 6 - Phosphorus trichloride is used in the manufacture...Ch. 6 - Pure silicon, which is needed in the manufacturing...Ch. 6 - Nitrous oxide gas (systematic name: dinitrogen...Ch. 6 - Solid zinc is added to an aqueous solution...Ch. 6 - Acetylene gas (C2H2) is often used by plumbers,...Ch. 6 - The burning of high-sulfur fuels has been shown to...Ch. 6 - The Group 2 metals (Ba, Ca, Sr) can be produced in...Ch. 6 - There are fears that the protective ozone layer...Ch. 6 - Carbon tetrachloride was widely used for many...Ch. 6 - When elemental phosphorus, P4, burns in oxygen...Ch. 6 - Calcium oxide is sometimes very challenging to...Ch. 6 - Prob. 32QAPCh. 6 - The element tin often occurs in nature as the...Ch. 6 - Nitric acid, HNO3 , can be produced by reacting...Ch. 6 - When balancing chemical equations, beginning...Ch. 6 - The “Chemistry in Focus” segment The Beetle That...Ch. 6 - Balance each of the following chemical equations....Ch. 6 - Balance the equations for the reaction of...Ch. 6 - Balance each of the following chemical equations....Ch. 6 - Balance each of the following chemical equations....Ch. 6 - Balance each of the following chemical equations....Ch. 6 - Prob. 42QAPCh. 6 - Prob. 43QAPCh. 6 - Prob. 44QAPCh. 6 - Acetylene gas, C2H2 , is used in welding because...Ch. 6 - When balancing a chemical equation, which of the...Ch. 6 - Crude gunpowders often contain a mixture of...Ch. 6 - The following demonstration takes place in a...Ch. 6 - Methanol (methyl alcohol), CH3OH , is a very...Ch. 6 - The Hall process is an important method by which...Ch. 6 - Iron oxide ores, commonly a mixture of FeO and...Ch. 6 - True or false? Coefficients can be fractions when...Ch. 6 - When steel wool (iron) is heated in pure oxygen...Ch. 6 - One method of producing hydrogen peroxide is to...Ch. 6 - When elemental boron, B, is burned in oxygen gas,...Ch. 6 - A common experiment in introductory chemistry...Ch. 6 - A common demonstration in chemistry courses...Ch. 6 - Write a balanced chemical equation for the...Ch. 6 - Prob. 59APCh. 6 - Prob. 60APCh. 6 - If you had a “sour stomach,” you might try an...Ch. 6 - When iron wire is heated in the presence of...Ch. 6 - When finely divided solid sodium is dropped into a...Ch. 6 - If aqueous solutions of potassium chromate and...Ch. 6 - When hydrogen sulfide, H2S , gas is bubbled...Ch. 6 - If an electric current is passed through aqueous...Ch. 6 - When a strip of magnesium metal is heated in...Ch. 6 - Prob. 68APCh. 6 - When solid red phosphorus, is burned in air, the...Ch. 6 - When copper (II) oxide is boiled in an aqueous...Ch. 6 - When lead(II) sulfide is heated lo high...Ch. 6 - Which of the following statements about chemical...Ch. 6 - Prob. 73APCh. 6 - Prob. 74APCh. 6 - Prob. 75APCh. 6 - Using different shapes to distinguish between...Ch. 6 - Which of the following statements about chemical...Ch. 6 - Prob. 78CPCh. 6 - Balance the following chemical equations....
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