Chapter Seventeen Chemical Change 17 1 Chemical Reactions

  • Slides: 12
Download presentation

Chapter Seventeen: Chemical Change Ø 17. 1 Chemical Reactions Ø 17. 2 Balancing Equations

Chapter Seventeen: Chemical Change Ø 17. 1 Chemical Reactions Ø 17. 2 Balancing Equations Ø 17. 3 Classifying Reactions

17. 3 Addition reactions ØThe process of creating large molecules from small ones is

17. 3 Addition reactions ØThe process of creating large molecules from small ones is called polymerization.

17. 3 Addition reactions ØIn an addition reaction, two or more substances combine to

17. 3 Addition reactions ØIn an addition reaction, two or more substances combine to form a new compound.

17. 3 Decomposition reactions ØA chemical reaction in which a single compound is broken

17. 3 Decomposition reactions ØA chemical reaction in which a single compound is broken down to produce two or more smaller compounds is called a decomposition reaction.

17. 3 Single Displacement ØIn a single-displacement reaction, one element replaces a similar element

17. 3 Single Displacement ØIn a single-displacement reaction, one element replaces a similar element in a compound.

17. 3 Double Displacement ØIn a double-displacement reaction, ions from two compounds in solution

17. 3 Double Displacement ØIn a double-displacement reaction, ions from two compounds in solution exchange places to produce two new compounds. ØOne of the compounds formed is usually a precipitate that settles out of the solution, a gas that bubbles out of the solution, or a molecular compound such as water.

17. 3 Precipitation reactions ØA precipitate is a new solid product that comes out

17. 3 Precipitation reactions ØA precipitate is a new solid product that comes out of solution in a chemical reaction. ØThe formation of a cloudy precipitate is evidence that a double-displacement reaction has occurred.

17. 3 Precipitation ØThe limewater test for carbon dioxide is a precipitation reaction.

17. 3 Precipitation ØThe limewater test for carbon dioxide is a precipitation reaction.

17. 3 Combustion reactions ØA combustion reaction, also called burning, occurs when a substance

17. 3 Combustion reactions ØA combustion reaction, also called burning, occurs when a substance such as wood, natural gas, or propane combines with oxygen and releases a large amount of energy in the form of light and heat.

17. 3 Combustion reactions ØWhat do reactants like wood, natural gas, and propane have

17. 3 Combustion reactions ØWhat do reactants like wood, natural gas, and propane have in common?