Chemistry Chapter: Types of Chemical Reactions

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Questions and Answers

What type of reaction occurs when two or more reactants combine to form a single product?

  • Displacement reaction
  • Combination reaction (correct)
  • Decomposition reaction
  • Precipitation reaction

What is the formula for a decomposition reaction?

  • 2X + Y = XY
  • XY = X + Y (correct)
  • X + Y = XY
  • X + YZ = XZ + Y

What type of reaction occurs when a more reactive element removes a less reactive element from its aqueous salt solution?

  • Precipitation reaction
  • Combination reaction
  • Displacement reaction (correct)
  • Decomposition reaction

What is an example of a combination reaction?

<p>2Na + Cl2 = 2NaCl (A)</p> Signup and view all the answers

What type of reaction involves the breakdown of a chemical into two or more smaller components?

<p>Decomposition reaction (B)</p> Signup and view all the answers

Which type of reaction has the same formula as a synthesis reaction?

<p>Combination reaction (C)</p> Signup and view all the answers

What occurs when a chemical decomposes as a result of heating?

<p>Thermal decomposition reaction (A)</p> Signup and view all the answers

Which reaction type is the exact inverse of a combination reaction?

<p>Decomposition reaction (C)</p> Signup and view all the answers

What is the general formula for a displacement reaction?

<p>X + YZ = XZ + Y (A)</p> Signup and view all the answers

Which reaction involves the removal of a less reactive element from its aqueous salt solution?

<p>Displacement reaction (B)</p> Signup and view all the answers

What is the name of the reaction that involves the breakdown of a chemical into two or more smaller components?

<p>Decomposition reaction (D)</p> Signup and view all the answers

Which reaction has the formula XY = X + Y?

<p>Decomposition reaction (A)</p> Signup and view all the answers

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Study Notes

Types of Chemical Reactions

  • There are five main types of chemical reactions: combination, decomposition, displacement, double displacement, and precipitation reactions.

Combination Reaction

  • A combination reaction occurs when two or more reactants combine to form a single product.
  • The formula for a combination reaction is X + Y = XY.
  • Also known as a synthesis reaction.
  • Example: 2Na + Cl2 = 2NaCl.

Decomposition Reaction

  • A decomposition reaction occurs when a single chemical breaks down into two or more smaller components.
  • The formula for a decomposition reaction is XY = X + Y.
  • The exact inverse of a combination reaction.
  • Example: CaO + CO2 = CaCO3.
  • A thermal decomposition reaction occurs when a chemical decomposes as a result of heating.

Displacement Reaction

  • A displacement reaction occurs when a more reactive element removes a less reactive element from its aqueous salt solution.
  • The formula for a displacement reaction is X + YZ = XZ + Y.
  • Also known as a substitution reaction.
  • Example: Zn + CuSO4 = ZnSO4 + Cu.

Types of Chemical Reactions

  • There are five main types of chemical reactions: combination, decomposition, displacement, double displacement, and precipitation reactions.

Combination Reaction

  • A combination reaction occurs when two or more reactants combine to form a single product.
  • The formula for a combination reaction is X + Y = XY.
  • Also known as a synthesis reaction.
  • Example: 2Na + Cl2 = 2NaCl.

Decomposition Reaction

  • A decomposition reaction occurs when a single chemical breaks down into two or more smaller components.
  • The formula for a decomposition reaction is XY = X + Y.
  • The exact inverse of a combination reaction.
  • Example: CaO + CO2 = CaCO3.
  • A thermal decomposition reaction occurs when a chemical decomposes as a result of heating.

Displacement Reaction

  • A displacement reaction occurs when a more reactive element removes a less reactive element from its aqueous salt solution.
  • The formula for a displacement reaction is X + YZ = XZ + Y.
  • Also known as a substitution reaction.
  • Example: Zn + CuSO4 = ZnSO4 + Cu.

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