Classifying Chemical Reactions Flashcards

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Questions and Answers

What is a synthesis reaction?

  • A reaction where a compound breaks up into two or more elements.
  • A reaction that involves an exchange of ions between compounds.
  • A reaction where 2 or more substances react to form a single product. (correct)
  • A reaction where atoms of one element replace another in a compound.

Which of the following describes a decomposition reaction?

  • A reaction where a compound breaks up into two or more elements or new compounds. (correct)
  • A reaction where a hydrocarbon reacts with oxygen.
  • A reaction where 2 or more substances form a single product.
  • A reaction involving an exchange of ions.

What is a characteristic of a single-replacement reaction?

  • A reaction involving the exchange of ions between two compounds.
  • A reaction forming a solid from a solution.
  • A reaction that creates heat and light through combustion.
  • A reaction where atoms of one element replace the atoms of another element in a compound. (correct)

What defines a double-replacement reaction?

<p>A reaction involving an exchange of ions between two compounds. (D)</p>
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What is a combustion reaction?

<p>A reaction where a hydrocarbon reacts with oxygen.</p>
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Define a chemical equation.

<p>A way to describe a chemical reaction using chemical formulas and symbols.</p>
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What is a precipitate?

<p>A solid that forms from a solution during a chemical reaction.</p>
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What is the role of a coefficient in a chemical equation?

<p>A number in front of a chemical formula indicating the number of molecules or atoms involved.</p>
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What is a word equation?

<p>An equation in which the reactants and products are represented by words.</p>
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What defines a formula equation?

<p>A representation of reactants and products by their symbols or formulas.</p>
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What is electrolysis?

<p>The decomposition of a substance by an electric current.</p>
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Study Notes

Types of Chemical Reactions

  • Synthesis Reaction: Combines two or more reactants to create a single product (e.g., A + B → AB).
  • Decomposition Reaction: A single compound breaks down into two or more elements or new compounds (e.g., AB → A + B or ABC → AB + C).
  • Single-Replacement Reaction: An atom from one element replaces an atom in a compound (e.g., A + BX → AX + B).
  • Double-Replacement Reaction: Involves the exchange of ions between two compounds (e.g., AX + BY → AY + BX).
  • Combustion Reaction: Hydrocarbons react with oxygen to produce energy, carbon dioxide, and water.

Chemical Notation

  • Chemical Equation: Describes a chemical reaction using symbols and formulas to represent reactants and products.
  • Precipitate: A solid that forms when a solution undergoes a chemical reaction, indicating a new substance has been created.
  • Coefficient: Indicates the number of molecules or atoms involved in the reaction, placed in front of chemical formulas (e.g., 2Hâ‚‚O indicates two water molecules).
  • Word Equation: Represents reactants and products using words instead of symbols (e.g., hydrogen + oxygen → water).
  • Formula Equation: Uses chemical symbols or formulas to depict the reactants and products in a chemical reaction (e.g., 2Hâ‚‚ + Oâ‚‚ → 2Hâ‚‚O).
  • Electrolysis: The process of breaking down a substance using an electric current, often used to separate elements from compounds.

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