We can certainly define a "precipitation reaction" as any reaction that produces a solid, but the definition that will help you on your exam is the first one you give. And once you have those tools making a distinction between reaction "types" will be less important (though still often useful). The fact is that there's nothing fundamental about these classes of reactions, chemistry is chemistry, but chemistry is an awful big subject and by separating reactions into these classes it becomes much easier to learn the tools we need to analyze them. Your instructor would teach this as an oxidation-reduction reaction and expect you to used the rules for oxidation-reduction reactions to analyse it the solubility rules are no help here. In other words, it may be defined as a process of converting a precipitate into a colloidal sol by shaking it with dispersion medium in the presence of a small amount of electrolyte. Looking at the reaction you posted the solubility rules are no help, if I asked you to give the products of the precipitation reaction Peptization is the process responsible for the formation of stable dispersion of colloidal particles in the dispersion medium. You can easily identify that type of reaction and know how to analyze it, use the solubility rules. So when we define a precipitation reactions as ".a type of chemical reaction, in which two soluble salts in an aqueous solution combine and one of the products in an insoluble salt." that's easy. Separating reactions like this is useful because each of the three has nice simple rules you can use to analyze them. In general chemistry you will usually learn about three "classes" of reaction: precipitation, oxidation-reduction, and acid-base. A screenshot is preferable to a picture of your laptop screen. Please do not ask for help acquiring, preparing, or handling illicit substances or for help with any activity that does not fall within the confines of whatever laws apply to your particular location.īonus points: If submitting a picture please make sure that it is clear. Any infractions will be met with a temporary ban at the first instance and a permanent ban if there is another. It is also important that you describe the specific part of the problem you are struggling with. It is OK if you are a little (or a lot!) stuck, we just want to see that you have made an effort. Please complete any questions as much as you can before posting. We will not do your homework for you, so don't ask. Please flair yourself and read over the rules below before posting.
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