Chemistry Class: Classifying Reactions
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Questions and Answers

What is a precipitate?

An insoluble compound that comes out of the solution.

Describe the characteristics of the five types of chemical reactions.

1.) Synthesis: 2 or more reactants combine to make 1 product. 2.) Decomposition: When 1 reactant breaks down into 2 or more products. 3.) Combustion: When something is burned, with oxygen (O2) as a reactant and carbon dioxide (CO2) and water (H2O) as products. 4.) Single Replacement: One element replaces a similar element in a compound. 5.) Double Replacement: Two ionic compound reactants switch ions, forming two new ionic compound products, usually resulting in a precipitate.

Classify the reaction: AlBr3 + K2SO4 = KBr + Al2(SO4)3.

Double Replacement

Classify the reaction: Al + O2 = Al2O3.

<p>Synthesis</p> Signup and view all the answers

Classify the reaction: LiCl + Br2 = LiBr + Cl2.

<p>Single Replacement</p> Signup and view all the answers

Classify the reaction: NF3 = N2 + F2.

<p>Decomposition</p> Signup and view all the answers

Classify the reaction: C4H10 + O2 = CO2 + H2O.

<p>Combustion</p> Signup and view all the answers

Classify the reaction: Pb(OH)2 + HCl = H2O + PbCl2.

<p>Double Replacement</p> Signup and view all the answers

Write out the balanced chemical reaction for the reaction of solid sulfur with solid iron to form solid iron (III) sulfide.

<p>3S + 2Fe = Fe2S3</p> Signup and view all the answers

Write out the balanced chemical reaction for the reaction of hydrogen gas and iron (III) oxide to form water and iron powder.

<p>3H2 + Fe2O3 = 3H2O + 2Fe</p> Signup and view all the answers

Write out the balanced chemical reaction for the combustion of C3H8.

<p>C3H8 + 5O2 = 3CO2 + 4H2O</p> Signup and view all the answers

Study Notes

Precipitation

  • Precipitate refers to an insoluble compound that emerges from a solution.

Types of Chemical Reactions

  • Synthesis: Involves two or more reactants combining to form a single product.
  • Decomposition: A single reactant breaks down into two or more products.
  • Combustion: A reaction where a substance is burned, always involving oxygen (O2) as a reactant and producing carbon dioxide (CO2) and water (H2O) as products.
  • Single Replacement: One element in a compound is replaced by a similar element from another compound.
  • Double Replacement: Two ionic compounds react and exchange ions, typically resulting in the formation of a precipitate.

Reaction Classifications

  • Double Replacement: AlBr3 + K2SO4 = KBr + Al2(SO4)3.
  • Synthesis: Al + O2 = Al2O3.
  • Single Replacement: LiCl + Br2 = LiBr + Cl2.
  • Decomposition: NF3 = N2 + F2.
  • Combustion: C4H10 + O2 = CO2 + H2O.
  • Double Replacement: Pb(OH)2 + HCl = H2O + PbCl2.

Reaction Balancing and Classification

  • Synthesis Reaction: 3S + 2Fe = Fe2S3 (Solid sulfur reacts with solid iron to form solid iron (III) sulfide).
  • Single Replacement Reaction: 3H2 + Fe2O3 = 3H2O + 2Fe (Hydrogen gas reacts with iron (III) oxide to produce water and iron powder).
  • Combustion Reaction: C3H8 + 5O2 = 3CO2 + 4H2O (C3H8 is burned).

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Test your knowledge of chemical reactions with this flashcard quiz. Learn about the five types of chemical reactions including synthesis, decomposition, combustion, single replacement, and double replacement. Perfect for reviewing key concepts in chemistry!

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