# Question 4.12: Determining the Amount of a Species by Gravimetric Analysis ...

Determining the Amount of a Species by Gravimetric Analysis

A 1.000-L sample of polluted water was analyzed for lead(II) ion, $Pb^{2+}$, by adding an excess of sodium sulfate to it. The mass of lead(II) sulfate that precipitated was 229.8 mg. What is the mass of lead in a liter of the water? Give the answer as milligrams of lead per liter of solution.

PROBLEM STRATEGY

All of the lead in the water solution is precipitated as lead(II) sulfate, $PbSO_4$. If you determine the percentage of lead in $PbSO_4$, you can calculate the quantity of lead in the water sample.

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Question: 4.9

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You find that 0.38 g NaNO_3  is   4.\underl...
Question: 4.3

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a. The formulas of the compounds are NaCl and [lat...
Question: 4.2

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a. According to the solubility rules presented in ...
Question: 4.14

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The calculation is as follows: 4.47  \times...
Question: 4.13

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The calculation is as follows: 35.0  \times...
Question: 4.11

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You know the final volume (100.0 mL), final concen...
Question: 4.10

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Here is the calculation. (The molar mass of NaOH i...
Question: 4.1

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a. According to Rule 3 in Table 4.1, most compound...
Question: 4.8