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Classifying Chemical Reactions: A Comprehensive Guide with Examples, Study Guides, Projects, Research of Chemistry

Single Replacement Reaction: A reaction in which the atoms of one element replaces the atoms of another element in a compound. A + BX. B + AX.

Typology: Study Guides, Projects, Research

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January 11, 2015
Classifying Chemical Reactions
Types of chemical reactions:
1. Synthesis
2. Decomposition
3. Combustion
4. Single-Replacement
5. Double-replacement
*Classifying how atoms rearrange during a chemical
reaction
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Classifying Chemical Reactions

Types of chemical reactions:

  1. Synthesis
  2. Decomposition
  3. Combustion
  4. Single-Replacement
  5. Double-replacement *Classifying how atoms rearrange during a chemical reaction
  1. Synthesis reaction : 2 or more substances react to produce a single product

A + B AB

Example: 2 Na(s) + Cl 2 (g) 2 NaCl(s) CaO(s) + H 2 O(l) Ca(OH) 2 (s)

  1. Combustion reaction : Oxygen combines with a substance and releases energy in the form of heat and light. Always need O 2! Example: CH 4 (g) + 2 O 2 (g) CO 2 (g) + 2 H 2 O(g) 2 C 2 H 6 (g) + 7 O 2 (g) 4 CO 2 (g) + 6 H 2 O(g)

Balancing Combustion Reactions:

  • Always balance C and H first.
  • Then use O 2 to balance out oxygen

    If you have an ODD number of oxygen that need to be balanced (X), put the coefficient X/ 2 in front of O 2 , then multiply the entire equation by 2 to get integers for coefficients.

  • Example: Combustion of butane C 4 H 10 + O 2 CO 2 + H 2 O

Use activity series to predict whether or not certain reactions will happen. Predict whether or not this reaction will occur: Ag(s) + Cu(NO 3 ) 2 (aq) F 2 (g) + 2 NaBr(aq)

  1. Double Replacement Reaction: Reaction in which there is an exchange of ions between compounds.

AX + BY AY + BX

*Cations switch places *Always produce a precipitate, a gas, or water Ex: Ca(OH) 2 (aq) + 2 HCl(aq) CaCl 2 (aq) + 2 H 2 O(l) AgNO 3 (aq) + NaCl(aq)