General chemistryLesson 2 of 5 in the course Stoichiometry of Chemical Reactions

Precipitation, Acid–Base, and Redox Reactions: Patterns and Equations

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Chemical reactions can be grouped by shared patterns, much as human interactions can be classified by what people do. Recognizing a reaction pattern helps chemists predict products, explain what changes, and choose an appropriate way to represent the process.

A chemical reaction transforms reactants into products. Although many reactions have unique details, recurring patterns allow chemists to organize and understand them. This unit introduces three important classes: precipitation reactions, acid-base reactions, and oxidation-reduction (redox) reactions.

All flashcards

Molecular equation
An equation that represents reactants and products using compound formulas.
Complete ionic equation
An equation that shows soluble ionic compounds in water as separated ions.
Weak acid
An acid that reacts only partially with water, leaving most molecules un-ionized.
Reducing agent
A species that supplies electrons and is itself oxidized.
Oxidation number
The charge an atom would have if its compound were treated as ionic.

Quiz questions

  1. Why do chemists classify chemical reactions?Answer: To recognize recurring patterns that help explain and predict chemical changes.
  2. How does a strong acid differ from a weak acid in water?Answer: It reacts essentially completely with water.
  3. What happens to an oxidizing agent during a redox reaction?Answer: It accepts electrons and is reduced.
  4. In the half-reaction method for acidic solution, what is used to balance hydrogen atoms after oxygen is balanced?Answer: H⁺ ions
  5. Which statement describes a net ionic equation?Answer: It shows species that undergo chemical change and omits spectator ions.

Based on Chemistry 2e by Paul Flowers, Klaus Theopold, Richard Langley, William R. Robinson, PhD (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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