SABIC CHEM 101 Chapter 4 - Part 2

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

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Chemical Reactions in Water Many relevant chemical reactions occur in water.
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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
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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
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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
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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:
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