Problem: Which of the following pairs of aqueous solutions will form a precipitate when mixed?a. HCl + LiOHb. MgCl2 + KOHc. Li2S + HCld. K2CO3 + HNO3e. All of these solution pairs will produce a precipitate

FREE Expert Solution

We are asked to identify which reactants will produce a precipitate. 


We will refer to the solubility rules in order to determine if the product form would be an insoluble salt (precipitate) 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

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

a. HCl + LiOH

b. MgCl2 + KOH

c. Li2S + HCl

d. K2CO3 + HNO3

e. All of these solution pairs will produce a precipitate

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