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Solution: Write the balanced equation for the reaction of aqueous Pb(ClO 3)2 with aqueous NaI. Include phases.What mass of precipitate will form if 1.50 L of concentrated Pb(ClO 3)2 is mixed with 0.500 L of 0.150 M NaI? Assume the reaction goes to completion.

Problem

Write the balanced equation for the reaction of aqueous Pb(ClO 3)2 with aqueous NaI. Include phases.

What mass of precipitate will form if 1.50 L of concentrated Pb(ClO 3)2 is mixed with 0.500 L of 0.150 M NaI? Assume the reaction goes to completion.

Solution

We are asked to calculate the mass of the precipitate formed when two salts are mixed together. We will refer to the solubility rules in order to determine which of the product formed would be an insoluble salt (precipitate).

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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