Problem: What would be the formula of the precipitate that forms when Pb(NO3)2(aq) and K2SO4(aq) are mixed?A) PbK2B) H2OC) K(NO3)2D) PbSO4

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We are asked to identify the formula of the precipitate that forms when Pb(NO3)2(aq) and K2SO4(aq) are mixed. We will refer to the solubility rules in order to determine if an insoluble product (precipitate) is formed or not.

Solubility Rules:

•Soluble Ionic Compounds:

▪ Group 1A ions (Li+, Na+, K+, etc.) and Ammonium ion (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+

• Insoluble Ionic Compounds:

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Problem Details

What would be the formula of the precipitate that forms when Pb(NO3)2(aq) and K2SO4(aq) are mixed?

A) PbK2

B) H2O

C) K(NO3)2

D) PbSO4

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