How do I determine whether a precipitate will form when mixing two solutions?

Question

For example:
If I mix these following solutions, will a precipitate form and how will I know?
NiSO4(aq) + Pb(NO3)2(aq)
Na2CO3(aq) + NH4Cl(aq)

I have checked out the solubility chart and still think I'm getting the right answers but it turns out I'm not so what could i be doing wrong?

Answer 1

You have to look at all possible combinations of the ions present, and see whether any of those combinations result in an insoluble compound. If so, that compound will precipitate out of solution.

For example, if you mix silver nitrate solution with sodium chloride solution, the possible combinations are:

sodium chloride
sodium nitrate
silver chloride
silver nitrate

Of these possible combinations, silver chloride is an insoluble compound. The other three are all soluble in water. Therefore if you mix these two solutions, white silver chloride will precipitate out of the solution.

Answer 2

This Site Might Help You.

RE:
How do I determine whether a precipitate will form when mixing two solutions?
For example:
If I mix these following solutions, will a precipitate form and how will I know?
NiSO4(aq) + Pb(NO3)2(aq)
Na2CO3(aq) + NH4Cl(aq)

Answer 3

I'll help you this time, but use a solubility chart next time. Here are the precipitates that form in the above reactions:


1) PbSO4 (s)

2) No precipitate

Answer 4

(c) I'm not sure how you would know this with just one experiment, but of the following salts {Cu(ClO4)2, LiClO4, Li3PO4, Cu3(PO4)2} the last is the least soluble and therefore the one that would precipitate. So your answer is "Cu^2+, PO4^3-" (d) 3 Cu(ClO4)2(aq) + 2 Li3PO4(aq) ---> 6 LiClO4(aq) + Cu3(PO4)2(s)

Answer 5

check out the solubility chart
its a chart that shows the reactions of most common elements and compounds and if they produce ppt or not.

Answer 6

you should see a residue on (floating) the mixed solutions, thats the precipitate..

Answer 7

chrystal meth lab,huh?