Chemistry Practice Problems Electrolytes Practice Problems Solution: Of those below, which is most soluble in water?A. ...

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Solution: Of those below, which is most soluble in water?A. Ca3(PO4)2 B. AgCl C. Na2S D. PbI2 E. CuS

Problem

Of those below, which is most soluble in water?

A. Ca3(PO4)2 

B. AgCl 

C. Na2

D. PbI2 

E. CuS

Solution

Use the concept of solubility rules to determine which of the compounds is the most soluble in water

Solubility Rules:

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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