SABIC CHEM 101 Chapter 4 - Part 2

SABIC CHEM 101 Chapter 4 - Part 2 - Chemical Reactions in...

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Unformatted text preview: Chemical Reactions in Water Many relevant chemical reactions occur in water. Types of Chemical Reac1ons Most reactions that take place in aqueous solutions can be grouped into one of three types: • Precipita*on Reac*ons • Acid–Base Reac*ons • Oxida*on–Reduc*on Reac*ons Precipita1on Reac1on Precipitation Reaction: When two solutions undergo a chemical reaction that results in the precipitation of one of the products from the solution as a solid. A double displacement reaction in which a solid forms and separates from the solution When mixing solutions of ionic compounds, all of the ions in the system interact with each other. AB (aq) + XY (aq) A + B- X + Y- H 2 O We do not have isolated ions but rather a mixture of ions that can all interact with each other Precipita1on Reac1on Precipitation Reaction: When two solutions undergo a chemical reaction that results in the precipitation of one of the products from the solution as a solid. A double displacement reaction in which a solid forms and separates from the solution When mixing solutions of ionic compounds, all of the ions in the system interact with each other. If the interactions between these ions are strong enough, they may group together, form a lattice and “ precipitate ” (segregate from solution). The interactions between ions may lead to the formation of a new product: PRECIPITATE Precipita1on Reac1on Ba 2+ ( aq ) + 2NO 3 ‐ + 2K + + CrO 4 2– ( aq ) Let us consider the reaction between Ba(NO 3 ) 2(aq) and K 2 CrO 4(aq) An accurate description of the ions in solution is: Ba 2+ ( aq ) + 2NO 3 ‐ + 2K + + CrO 4 2– ( aq ) → Yellow Precipitate When the two solutions are mixed, a yellow precipitate forms: Precipita1on Reac1on...
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This note was uploaded on 10/13/2011 for the course CHEM 101 taught by Professor Fitts during the Fall '08 term at UPenn.

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SABIC CHEM 101 Chapter 4 - Part 2 - Chemical Reactions in...

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