Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Chapter 3, Problem 3.33PAE

3.33 Balance the following equations, and then write the net

ionic equation.

(a) Zn(s) + HC1(aq) ( H2(g) + ZnCl2(aq)

(b) Mg(OH)2 (s)+ HCl (aq) ( MgCl2(aq) + H2O (l)

(c) HNO3(aq) + CaCO3(s) ( Ca(NO3)2(aq) + H20(l) + CO2(g)

(d) (NH4)2S (aq)+ FeCl3(aq)( NH4Cl (aq)+Fe2S3(s)

Expert Solution
Check Mark
Interpretation Introduction

To Determine:

To determine the balanced chemical equation and net ionic equation.

Explanation of Solution

Given Information:

The unbalanced chemical equation is Zn(s) + HCl(aq)  H2(g) + ZnCl2(aq)

The Balanced chemical equation is-

Zn(s) + 2 HCl(aq) = H2(g) + ZnCl2(aq)

In the Balanced chemical equation Zn, H, & Cl atoms remain unchanged on both the sides. Copper ion is the spectator ion here so the net ionic equation will be as follows −

Zn(s)**#x00A0;+ 2 H+(aq) = H2(g) + Zn2+(aq)

Expert Solution
Check Mark
Interpretation Introduction

To Determine:

To determine the balanced chemical equation and net ionic equation.

Explanation of Solution

Given Information:

The unbalanced chemical equation is Mg(OH)2(s) +  HCl(aq)  MgCl2(aq) + 2 H2O

The Balanced chemical equation is-

Mg(OH)2(s) + 2 HCl(aq) = MgCl2(aq) + 2 H2O

In the Balanced chemical equation Mg, H, O, & Cl atoms remain unchanged on both the sides. There are no spectator ions here so the net ionic equation will be as follows −

Mg(OH)2(s)**#x00A0;+ 2 H+(aq) = Mg2+(aq) + 2 H2O

Expert Solution
Check Mark
Interpretation Introduction

To Determine:

To determine the balanced chemical equation and net ionic equation.

Explanation of Solution

Given Information:

The unbalanced chemical equation is - HNO3(aq) + CaCO3(s)  Ca(NO3)2(aq) + H2O + CO2(g)

The Balanced chemical equation is-

2 HNO3(aq) + CaCO3(s) = Ca(NO3)2(aq) + H2O + CO2(g)

In the Balanced chemical equation Ca, H, C, O, & N atoms remain unchanged on both the sides. There are no spectator ions here so the net ionic equation will be as follows −

2**#x00A0;H+(aq) + CaCO3(s) = Ca2+(aq) + H2O + CO2(g)

Expert Solution
Check Mark
Interpretation Introduction

To Determine:

To determine the balanced chemical equation and net ionic equation.

Explanation of Solution

Given Information:

The unbalanced chemical equation is (NH4)2S(aq) + FeCl3(aq)   NH4Cl(aq) + Fe2S3(s)

The Balanced chemical equation is-

3 (NH4)2S(aq) + 2 FeCl3(aq) = 6 NH4Cl(aq) + Fe2S3(s)

In the Balanced chemical equation N, H, S, Cl & Fe remain unchanged on both the sides. Copper ion is the spectator ions here so the net ionic equation will be as follows −

3**#x00A0;S2(aq)+2Fe3+(aq)=Fe2S3(s)

Conclusion
Zn(s) + 2 HCl(aq) = H2(g) + ZnCl2(aq)

Net ionic equation Zn(s) + 2 H+(aq) = H2(g) + Zn2+(aq)

Mg(OH)2(s) + 2 HCl(aq) = MgCl2(aq) + 2 H2O

Net Ionic equation Mg(OH)2(s) + 2 H+(aq) = Mg2+(aq) + 2 H2O

2 HNO3(aq) + CaCO3(s) = Ca(NO3)2(aq) + H2O + CO2(g)

Net Ionic equation 2 H+(aq) + CaCO3(s) = Ca2+(aq) + H2O + CO2(g)

3 (NH4)2S(aq) + 2 FeCl3(aq) = 6 NH4Cl(aq) + Fe2S3(s)

Net Ionic equation 3 S2(aq)+2Fe3+(aq)=Fe2S3(s)

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Chapter 3 Solutions

Chemistry for Engineering Students

Ch. 3 - Prob. 11COCh. 3 - Prob. 12COCh. 3 - Prob. 13COCh. 3 - write molecular and ionic equations for acidbase...Ch. 3 - Prob. 3.1PAECh. 3 - Prob. 3.2PAECh. 3 - Prob. 3.3PAECh. 3 - A newspaper article states that biomass has...Ch. 3 - Prob. 3.5PAECh. 3 - Prob. 3.6PAECh. 3 - Which symbols are used to indicate solids,...Ch. 3 - How is the addition of heat symbolized in a...Ch. 3 - Prob. 3.9PAECh. 3 - 3.10 Define the term stoichiometric coefficient.Ch. 3 - 3.11 Balance these equations. (a) Al(s) + O2(g)(...Ch. 3 - 3.11 Balance the following equations. (a) CaC2(s)...Ch. 3 - 3.13 An explosive whose chemical formula is...Ch. 3 - 3.14 A number of compounds are used in cement, and...Ch. 3 - 3.15 Ethanol, C2H5OH is found in gasoline blends...Ch. 3 - 3.16 Balance the following equations. (a) reaction...Ch. 3 - 3.17 Write balanced chemical equations for the...Ch. 3 - 3.18 Diborane and related compounds were proposed...Ch. 3 - 3.19 Silicon nitride, Si3N4, is used as a...Ch. 3 - Prob. 3.21PAECh. 3 - Prob. 3.20PAECh. 3 - Prob. 3.23PAECh. 3 - Prob. 3.22PAECh. 3 - 3.24 Classify the following compounds as...Ch. 3 - 3.25 The following compounds are water-soluble....Ch. 3 - 3.26 Decide whether each of the following is...Ch. 3 - Prob. 3.27PAECh. 3 - 3.28 A packaging engineer is working on a new...Ch. 3 - 3.29 Classify each of these as an acid or a base....Ch. 3 - 3.30 Define the term spectator ion.Ch. 3 - 3.31 What is the difference between a total ionic...Ch. 3 - 3.32 Balance the following equations and then...Ch. 3 - 3.33 Balance the following equations, and then...Ch. 3 - 3.34 In principle, it may be possible to engineer...Ch. 3 - 3.35 Explain the concept of the mole in your own...Ch. 3 - 3.36 How many entities are present in each of the...Ch. 3 - 3.37 If atypical grain of sand occupies a volume...Ch. 3 - 3.38 Estimate the size of a particle 1 mole of...Ch. 3 - 3.39 Calculate the molar mass of each of the...Ch. 3 - 3.40 Calculate the molar masses (in grams per...Ch. 3 - 3.41 Calculate the molar mass of each of these...Ch. 3 - Prob. 3.42PAECh. 3 - 3.43 Calculate the molar mass of the following...Ch. 3 - 3.44 Determine the molar mass of these ceramic...Ch. 3 - A chemist needs exactly 2 moles of KNO3 to make a...Ch. 3 - 3.46 What mass of ozone (O3) contains 4.5 moles of...Ch. 3 - 3.47 Calculate the mass in grams of each the...Ch. 3 - 3.48 Calculate the mass in grams of 13.5 mol of...Ch. 3 - 3.49 How many moles are present in the given...Ch. 3 - 3.50 A test of an automobile engine's exhaust...Ch. 3 - 3.51 Modern instruments can measure a mass as...Ch. 3 - 3.52 How many H atoms are present in 7.52 g of...Ch. 3 - 3.53 How many O atoms are present in 214 g of...Ch. 3 - A sample of H2C2O4.2H2O of mass 3.35 g is heated...Ch. 3 - 3.55 An average person inhales roughly 2.5 g of O2...Ch. 3 - 3.56 A large family of boron-hydrogen compounds...Ch. 3 - Prob. 3.57PAECh. 3 - 3.58 Determine the simplest formulas of the...Ch. 3 - 3.59 The composition of materials such as alloys...Ch. 3 - 3.60 Copper can have improved wear resistance if...Ch. 3 - 3.61 Calculate the molarity of each of the...Ch. 3 - 3.62 What is the molarity of each ion present in...Ch. 3 - 3.63 How many moles of solute are present in each...Ch. 3 - 3.64 How many grams of solute are present in each...Ch. 3 - 3.65 Determine the final molarity for the...Ch. 3 - Prob. 3.66PAECh. 3 - Prob. 3.67PAECh. 3 - 3.68 Magnesium is lighter than other structural...Ch. 3 - Prob. 3.69PAECh. 3 - Prob. 3.70PAECh. 3 - 3.71 What is meant by the term carbon reservoir?...Ch. 3 - Prob. 3.72PAECh. 3 - Prob. 3.73PAECh. 3 - Prob. 3.74PAECh. 3 - 3.75 The following pictures show a molecular-scale...Ch. 3 - Prob. 3.76PAECh. 3 - 3.77 Answer each of the following questions. Note...Ch. 3 - 3.78 Consider two samples of liquid: I mole of...Ch. 3 - 3.79 Consider two samples. Sample A contains 2...Ch. 3 - 3.80 Which one of the following metal samples...Ch. 3 - 3.81 The particulate scale drawing shown depicts...Ch. 3 - 3.82 The particulate scale drawing shown depicts...Ch. 3 - 3.83 For the reaction of nitrogen, N2, and...Ch. 3 - 3.84 The picture shown depicts the species present...Ch. 3 - 3.85 The particulate drawing shown represents an...Ch. 3 - 3.86 When a solution is diluted, solvent is added...Ch. 3 - 3.87 Nitric acid (HNO3) can be produced by the...Ch. 3 - 3.88 One Step in the enrichment of uranium for use...Ch. 3 - 3.89 Pyridine has the molecular formula C5H5N....Ch. 3 - 3.90 Pyrrole has the molecular formula C4H5N. When...Ch. 3 - 3.91 Hydrogen cyanide (HCN) is extremely toxic,...Ch. 3 - 3.92 Many chemical reactions take place in the...Ch. 3 - 3.93 Adipic acid is used in the production of...Ch. 3 - 3.94 Calcium carbonate (limestone, CaCO3)...Ch. 3 - 3.95 Cumene is a hydrocarbon, meaning that it...Ch. 3 - 3.96 Methyl cyanoacrylate is the chemical name for...Ch. 3 - 3.97 A low-grade form of iron ore is called...Ch. 3 - 3.98 The characteristic odor of decaying flesh is...Ch. 3 - 3.99 Iron—platinum alloys may be useful as...Ch. 3 - 3.100 Some aluminum—lithium alloys display the...Ch. 3 - 3.101 Which (if any) of the following compounds...Ch. 3 - 3.102 Classify the following compounds as acids or...Ch. 3 - 3.103 What is the mass in grams of solute in 250.0...Ch. 3 - 3.104 What volume of 0.123 M NaOH in milliliters...Ch. 3 - 3.105 Nitric acid is often sold and transported as...Ch. 3 - 3.106 Twenty-five mL of a 0.388 M solution of...Ch. 3 - 3.107 As computer processor speeds increase, it is...Ch. 3 - 3.108 As chip speeds increase, the width of the...Ch. 3 - 3.109 Materials engineers often create new alloys...Ch. 3 - 3.110 The protein that carries oxygen in the blood...Ch. 3 - 3.111 The chlorophyll molecule responsible for...Ch. 3 - 3.112 In one experiment, the burning of 0.614 g of...Ch. 3 - 3.113 MgCl2 is often found as an impurity in table...Ch. 3 - Prob. 3.114PAECh. 3 - 3.115 The average person exhales 1.0 kg of carbon...Ch. 3 - 3.116 The simplest approximate chemical formula...Ch. 3 - 3.117 For the oxides of iron, FeO, Fe2O3, and...Ch. 3 - 3.118 Consider common sugars such as glucose...Ch. 3 - Prob. 3.119PAECh. 3 - 3.120 1f you have 32.6 g of sodium carbonate that...Ch. 3 - 3.121 If you have 21.1 g of iron(II) nitrate that...Ch. 3 - 3.122 What type of reasoning were we using when we...Ch. 3 - 3.123 Most periodic tables provide molar masses...
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