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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 3, Problem 3PS
Textbook Problem
3 views

Balance the following equations:

(a) Cr(s) + O2(g) → Cr2O3(s)

(b) Cu2S(s) + O2(g) → Cu(s) + SO2(g)

(c) C6H5CH3()+ O2(g) → H2O() + CO2(g)

(a)

Interpretation Introduction

Interpretation:

The given equation should be balanced.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

Explanation of Solution

Chromium reacts with oxygen which yields the Chromium trioxide and the unbalanced equation is given below using correct molecular formula,

  

Balance the chromium atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.  There is two chromium in the right side and one chromium in the left side.  Therefore according to the chromium atom two molecules of chromium is added to the left side.  Therefore according to the chromium atom the balanced equation is given below.

  

Next, balance the oxygen atom in the equation, there are two oxygen atom in the left side and three oxygen atom in right side.  For the balancing the oxygen atom, two molecules of chromium trioxide is added to the right side...

(b)

Interpretation Introduction

Interpretation:

The given equation should be balanced.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

(c)

Interpretation Introduction

Interpretation:

The given equation should be balanced.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

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Chapter 3 Solutions

Chemistry & Chemical Reactivity
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Ch. 3.5 - In each of the following cases, aqueous solutions...Ch. 3.5 - Aqueous solutions of the two reactants listed...Ch. 3.5 - What is the net ionic equation for the reaction of...Ch. 3.6 - (a) Write a balanced equation for the reaction...Ch. 3.6 - Write the balanced, overall equation and the net...Ch. 3.6 - Which of the following is a strong add in aqueous...Ch. 3.6 - 2. The hydrogen phosphate ion is amphiprotic....Ch. 3.6 - What is the net ionic equation for the reaction of...Ch. 3.6 - Identify the basic oxide from those listed below....Ch. 3.7 - Barium carbonate, BaC0)3, is used in the brick,...Ch. 3.7 - Which of the following compounds, when treated...Ch. 3.8 - Assign an oxidation number to the underlined atom...Ch. 3.8 - The following reaction is used in a device for...Ch. 3.8 - 1. What is the oxidation number of Mn in...Ch. 3.8 - 2. Which of the following reactions are...Ch. 3.8 - 3. In which of the manganese compounds below does...Ch. 3.9 - Classify each of the following reactions as a...Ch. 3.9 - 1. Sometimes a reaction can fall in more than one...Ch. 3.9 - Use the following mass percentages to determine...Ch. 3.9 - What is the percent by mass of each element in...Ch. 3.9 - Assuming the charges on the yttrium and barium...Ch. 3.9 - The reaction of Y2O3, BaCO3, and CuO produces...Ch. 3.9 - The percentage of oxygen in YBCO is adjusted by...Ch. 3 - Write balanced chemical equations for the...Ch. 3 - Write balanced chemical equations for the...Ch. 3 - Balance the following equations: (a) Cr(s) + O2(g)...Ch. 3 - Balance the following equations: (a) Cr(s) +...Ch. 3 - Balance the following equations, and name each...Ch. 3 - Balance the following equations, and name each...Ch. 3 - Equal amounts of two acidsHCl and HCO2H (formic...Ch. 3 - Two aqueous solutions were prepared, one...Ch. 3 - What is an electrolyte? How can you differentiate...Ch. 3 - Name and give the formulas of two acids that are...Ch. 3 - Which compound or compounds in each of the...Ch. 3 - Which compound or compounds in each of the...Ch. 3 - The following compounds are water-soluble. What...Ch. 3 - The following compounds are water-soluble. What...Ch. 3 - Decide whether each of the following is...Ch. 3 - Decide whether each of the following is...Ch. 3 - Balance the equation for the following...Ch. 3 - Balance the equation for the following...Ch. 3 - Predict the products of each precipitation...Ch. 3 - Predict the products of each precipitation...Ch. 3 - Write a balanced equation for the ionization of...Ch. 3 - Write a balanced equation for the ionization of...Ch. 3 - Oxalic acid, H2C2O4, which is found in certain...Ch. 3 - Phosphoric add can supply one, two, or three H3O+...Ch. 3 - Write a balanced equation for reaction of the...Ch. 3 - Write a balanced equation for the reaction of...Ch. 3 - Complete and balance the equations for the...Ch. 3 - Complete and balance the equations for the...Ch. 3 - Write a balanced equation for the reaction of...Ch. 3 - Write a balanced equation for the reaction of...Ch. 3 - Write an equation that describes the equilibrium...Ch. 3 - Write an equation that describes the equilibrium...Ch. 3 - Write two chemical equations, one that shows H2O...Ch. 3 - Write two chemical equations, one in which H2PO4...Ch. 3 - Balance the following equations, and then write...Ch. 3 - Balance the following equations, and then write...Ch. 3 - Balance the following equations, and then write...Ch. 3 - Balance each of the following equations, and then...Ch. 3 - Write balanced net ionic equations for the...Ch. 3 - Write balanced net ionic equations for the...Ch. 3 - Siderite is a mineral consisting largely of...Ch. 3 - The mineral rhodothrosite is manganese()...Ch. 3 - Write an overall, balanced equation for the...Ch. 3 - Write an overall, balanced equation for the...Ch. 3 - Determine the oxidation number of each element in...Ch. 3 - Determine the oxidation number of each element in...Ch. 3 - Which two of the following reactions are...Ch. 3 - Which two of the following reactions are...Ch. 3 - In the following reactions, decide which reactant...Ch. 3 - In the following reactions, decide which reactant...Ch. 3 - Balance the following equations, and then classify...Ch. 3 - Balance the following equations, and then dassify...Ch. 3 - Classify each of the following reactions as a...Ch. 3 - Classify each of the following reactions as a...Ch. 3 - Balance each of the following equations, and...Ch. 3 - Complete and balance the equations below, and...Ch. 3 - The products formed in several reactions are given...Ch. 3 - The products formed in several reactions are given...Ch. 3 - Balance the following equations: (a) for the...Ch. 3 - Balance the following equations: (a) for the...Ch. 3 - Give a formula for each of the following...Ch. 3 - Give the formula for each of the following...Ch. 3 - Indicate which of the following copper(II) salts...Ch. 3 - Name two anions that combine with Al3+ ion to...Ch. 3 - Write the net ionic equation and identify the...Ch. 3 - Identify and name the water-insoluble product in...Ch. 3 - Bromine is obtained from sea water by the...Ch. 3 - Identify each of the blowing substances as a...Ch. 3 - The mineral dolomite contains magnesium...Ch. 3 - Aqueous solutions of ammonium sulfide, (NH4)2S,...Ch. 3 - Identify the primary species (atoms, molecules, or...Ch. 3 - (a) Name and give formulas for two water-soluble...Ch. 3 - Balance equations for these reactions that occur...Ch. 3 - For each reaction, write an overall, balanced...Ch. 3 - You are given mixtures containing the following...Ch. 3 - Identify, from each list below, the compound or...Ch. 3 - Identify, from each list below, the compound or...Ch. 3 - Write net ionic equations for the following...Ch. 3 - Gas evolution was observed when a solution of Na2S...Ch. 3 - The following reaction can be used to prepare...Ch. 3 - If you have silverware in your home, you know it...Ch. 3 - Suppose you wish to prepare a sample of magnesium...Ch. 3 - A Suggest a laboratory method for preparing barium...Ch. 3 - The Toliens test for the presence of reducing...Ch. 3 - There are many ionic compounds that dissolve in...Ch. 3 - Most naturally occurring acids are weak acids....Ch. 3 - You want to prepare barium chloride, BaC12, using...Ch. 3 - Describe how to prepare BaSO4, barium sulfate, by...Ch. 3 - A Describe how to prepare zinc chloride by (a) an...Ch. 3 - A common method for analyzing for the nickel...Ch. 3 - The presence of arsenic in a sample that may also...

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