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Ch 10: Chemical Reactions

About This Chapter

Watch enlightening chemical reactions video lessons with quizzes. Learn about acid-base reactions, the pH scale, redox reactions, combustion reactions and more.

Chemical Reactions

Chemistry is all about reactions, but understanding and classifying these reactions can be tricky. Don't worry; we teach you all the tricks. Our video lessons begin this journey with synthesis and decomposition reactions to help you write, identify and predict the products of either reaction. From there, we move on to the Arrhenius definition of acids and bases. Learn how to identify strong acids and bases while examining the many uses of acids. To cover all the bases, we also study how to identify acids and bases with the Bronsted-Lowry definition and the Lewis definition.

Don't think we're finished with acids and bases just yet. They're a cornerstone of chemical reactions, so we also explore the neutralization process for acid-base reactions and study amphoteric compounds than can act as both an acid or a base. Speaking of amphoteric compounds, we shift to water to show how its autoionization contributes to hydroxide and hydronium in a given reaction. Learn the strength of acids and bases as we investigate the pH scale. We also demonstrate how to calculate the pH as well as the pOH of any given solution.

We learn how bonding occurs in coordination compounds and move into precipitation reactions. Find out how to predict whether a precipitate will form and how to write net ionic equations. When it comes to oxidation numbers, we show you the rules for assigning these values, so you know how to find the find the oxidation numbers for elements in a chemical formula. With these concepts in mind, we can learn how to balance redox reactions using the half-reaction method. Learn how to identify oxidizing agents and reducing agents along the way.

We navigate the metals that make up the activity series and use them to predict the products for single displacement reactions. Learn how to identify the parts of an electrochemical cell and describe their functions. The half-reaction method comes in handy once more when it comes to cathode and anode half-cell reactions. Our exploration of chemical reactions leads us to explosive findings as we learn about combustion reactions. Find out to write and balance these equations. Don't be surprised if all these terms start to creep into your everyday life - we're relevant like that. Thanks for watching!

Lessons in Chapter 10: Chemical Reactions
Decomposition and Synthesis Reactions

1. Decomposition and Synthesis Reactions

Learn how to write, identify and predict the products of simple synthesis and decomposition reactions. This includes the composition of reactions with oxygen, of two metals, and of metals with nonmetals, as well as the decomposition of metal carbonates, metal chlorates and metal hydroxides.

The Arrhenius Definition of Acids and Bases

2. The Arrhenius Definition of Acids and Bases

In this lesson, you will learn the definition of Arrhenius acids and bases, discover some of their chemical properties and learn some examples. You will also learn about the difference between strong and weak Arrhenius acids and bases.

The Bronsted-Lowry and Lewis Definition of Acids and Bases

3. The Bronsted-Lowry and Lewis Definition of Acids and Bases

Learn the Bronsted-Lowry and Lewis definition of an acid and base. Discover how these theories differ from each other and from the Arrhenius theory of an acid and base. Learn how to identify an acid in terms of proton donation and a base as a proton acceptor and what a conjugate acid or base is.

Neutralization and Acid-Base Reactions

4. Neutralization and Acid-Base Reactions

From this lesson you will understand the neutralization process between acids and bases. Learn how a hydroxide ion from a base reacts with a hydronium ion from an acid to neutralize each other and form water. Discover what conjugate acids and bases are and what the definition of amphoteric is.

Dissociation Constant and Autoionization of Water

5. Dissociation Constant and Autoionization of Water

Learn the meaning of auto-ionization of water, sometimes called self-ionization, where water acts as a proton donor and acceptor to form both hydronium and hydroxide ions. Learn what the auto-ionization constant is and how to use it to determine the concentration of either hydroxide or hydronium ions in a solution when given the other value.

The pH Scale: Calculating the pH or pOH of a Solution

6. The pH Scale: Calculating the pH or pOH of a Solution

Learn the history of the pH scale, how to describe it and why it is used by scientists. Discover how to calculate the pH or of an acid or base solutions given either the hydroxide ion concentration or the hydronium ion concentration. Learn how to start with the pH and calculate the hydroxide and hydronium ion concentrations.

Coordination Chemistry: Bonding in Coordinated Compounds

7. Coordination Chemistry: Bonding in Coordinated Compounds

Discover what a coordinated compound is. Understand how bonding occurs in coordinated compounds and some of the possible shapes coordinated compounds can be. Learn the uses in nature and industry for coordinated compounds.

Precipitation Reactions: Predicting Precipitates and Net Ionic Equations

8. Precipitation Reactions: Predicting Precipitates and Net Ionic Equations

Learn what a precipitate is and predict when it will form in an aqueous chemical reaction, usually a double-replacement reaction. Learn what an ionic equation is, how it differs from a net ionic equation and how to write a net ionic equation.

Assigning Oxidation Numbers to Elements in a Chemical Formula

9. Assigning Oxidation Numbers to Elements in a Chemical Formula

Learn the importance of oxidation in chemical reactions. Discover the rules for assigning oxidation numbers in both covalent compounds and ionic compounds. Learn how to assign the oxidation number for each element in a chemical formula.

Balancing Redox Reactions and Identifying Oxidizing and Reducing Agents

10. Balancing Redox Reactions and Identifying Oxidizing and Reducing Agents

Learn to identify an oxidizing agent and a reducing agent and how the loss or gain of electrons applies to each one. Learn the relationship between an oxidized or reduced substance and the oxidizing or reducing agent associated with them. Discover what steps to take to balance a redox reaction.

The Activity Series: Predicting Products of Single Displacement Reactions

11. The Activity Series: Predicting Products of Single Displacement Reactions

Discover what a single replacement reaction is and how to identify it. Learn what chemical activity is, how that applies to an activity series table and how to predict the product of a single replacement reaction by referring to the activity series.

Electrochemical Cells and Electrochemistry

12. Electrochemical Cells and Electrochemistry

Learn to identify the parts of and be able to describe an electrochemical cell, including the electrolyte, electrodes, anodes, and cathodes. Learn how to make a homemade lemon battery and how to diagram an electrochemical cell that will light a light bulb.

Cathode and Anode Half-Cell Reactions

13. Cathode and Anode Half-Cell Reactions

Learn how to write electrode half-reactions for cathodes and anodes. Discover how to calculate cell voltage potential when given a table of standard electrode potentials. Learn how to prevent corrosion using redox concepts and how to protect metal by cathodic protection.

Writing and Balancing Combustion Reactions

14. Writing and Balancing Combustion Reactions

Discover what a combustion reaction is as well as what reactants are needed and what products are produced. Learn to write and balance a combustion reaction. Through the concepts of bond energies, learn how to explain why combustion reactions are largely exothermic.

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