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Chemistry / Chemistry 12 / Chapter 4 / Problem 4.131

Chemistry | 12th Edition | ISBN: 9780078021510 | Authors: Raymond Chang; Kenneth Goldsby

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Solved: The concentration of lead ions (Pb21) in a sample

Chapter 4, Problem 4.131

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QUESTION:

The concentration of lead ions (Pb21) in a sample of polluted water that also contains nitrate ions (NO3 2) is determined by adding solid sodium sulfate (Na2SO4) to exactly 500 mL of the water. (a) Write the molecular and net ionic equations for the reaction. (b) Calculate the molar concentration of Pb21 if 0.00450 g of Na2SO4 was needed for the complete precipitation of Pb21 ions as PbSO4.

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QUESTION:

The concentration of lead ions (Pb21) in a sample of polluted water that also contains nitrate ions (NO3 2) is determined by adding solid sodium sulfate (Na2SO4) to exactly 500 mL of the water. (a) Write the molecular and net ionic equations for the reaction. (b) Calculate the molar concentration of Pb21 if 0.00450 g of Na2SO4 was needed for the complete precipitation of Pb21 ions as PbSO4.

ANSWER:

Step 1 of 3

(a)

The molecular equation is as follows;

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