CHE 131 Chapter Notes - Chapter 4: Stoichiometry, Molar Mass, Salt Metathesis Reaction
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CHE 131 Full Course Notes
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4. 3- precipitation reactions: the key event-in formation of a solid from dissolved ions. Precipitation reactions- two soluble ionic compounds react to form an insoluble product. Precipitate- the product formed in a precipitation reaction. The electrostatic attraction between the ions outweighs the tendency of the ions to remain solvated and move around the solution. Precipitates form for the same reason ionic compounds don"t dissolve. When the two solutions are mixed, the ions collide and stay together and a solid product comes out of the solution. Formation of a soluble product through the net removal of ions from solution: predicting. There is a list of rules for solubility. 3 steps to help predict if a precipitate forms: Metathesis reactions- ions exchange partners in double replacement reactions: stoichiometry of precipitation reactions. The amount of reactants and products in a reaction are stoichiometrically equivalent to each other.