Problem: What precipitate is most likely formed from a solution containing Ba2+, K+, NO3-, and CO32- ?A) BaCO3B) K2CO3C) KNO3D) Ba(NO3)2

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Establish the solubility rules and determine which pair of ion will produce a precipitate among Ba2+, K+, NO3-, and CO32-

Recall that the Solubility Rules are:

Soluble Ionic Compounds:

Group 1A ions (Li+, Na+, K+, etc.) and Ammoniumion (NH4+) are soluble
▪ 
Nitrates (NO3-), Acetates (CH3COO- or C2H3O2-), and most Perchlorates (ClO4-) are soluble
▪ Cl-Br-, and I- are soluble except when paired with Ag+, Pb2+, Cu+, Hg22+
▪ 
Sulfates (SO42-) are soluble except those of Ca2+, Sr2+, Ba2+, Ag+, and Pb2+

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Problem Details

What precipitate is most likely formed from a solution containing Ba2+, K+, NO3-, and CO32- ?

A) BaCO3

B) K2CO3

C) KNO3

D) Ba(NO3)2

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