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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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smn smn
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11 years ago
For instance, in
3Ba(OH)2(aq) + 2H3PO4(aq) Rightwards Arrow Ba3(PO4)2(s) + 6H2O(l)

How do I know if one has formed? You don't have to tell me if it did or didn't, I just want to know what the process of determining this is.
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#1
11 years ago
In general you will need to refer to the solubility rules - which will tell you which compounds are insoluble. Then if one of the possible products of a double displacement reaction is insoluble a precipitate will form. In the reaction you give the precipitate is the solid Ba3(PO4)2(s).
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#2
11 years ago
You need to know the solubility product (Ksp) and then if the concentrations exceed that, you will get a ppt.  If the concentrations do not exceed that value, you will not get a ppt.
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