Which equations represent precipitation reactions?
(More than one correct answer)
1. Na2S + FeBr2 → 2NaBr + FeS
2.MgSO4 + CaCl2 → MgCl2 + CaSO4
3.LiOH + NH4I → LiI + NH4OH
4.2NaCl + K2S → Na2S + 2KCl
5.AgNO3 + NaCl → AgCl + NaNO3
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3. mgso4+cacl2= lil+nh4oh
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