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The following pairs of soluble solutions can be mixed. In some cases, this leads to the formation of an insoluble precipitate. Decide, in each case, whether or not an insoluble precipitate is formed.

K2S and NH4Cl
Li2S and MnBr2
CaCl2and NH4CO3
NaCl and K3PO4
Ba(NO3)2and Ag2SO4

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