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Some ionic compounds will dissolve (dissociate) in water. However, some ions are so attracted to one another that water can neither pry them apart or prevent them from "finding" one another an forming a solid. When two dissolved, aqueous, ions do this, they form a precipitate. A precipitation reaction is one in which two aqueous solutions are combined an a precipitate forms.
Precipitation reactions can give qualitative data, data that simply identifies the presence or absence of particular ions. They can also provided quantitative data, data that can be physically measured (by massing the precipitate formed).
Write the balanced chemical reaction that would occur when aqueous solutions of zinc sulfate heptahydrate and sodium carbonate are combined.
Now, consider how you would determine the amount (mass) of each reactant if you want to produce exactly 2.00g of the precipitate.
Do it!
Pre-lab:
Title
Purpose
Reaction
Covalent and Ionic Nomenclature Review Questions.
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