Problem 70P
Lead is found in Earth's crust as several lead compounds. Calculate the mass (in kg) of each compound that contains 1.0 × 103 kg of lead.
(a) PbS (galena)
(b) PbCO3 (cerussite)
(c) PbSO4 (anglesite)
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Solution 70P
Here, we have to calculate the mass of each compound that contains 1.0 × 103 kg of lead.
Molar mass of Pb = 207.2 g/mol
(a)PbS
Pb2+ + S2- ------->PbS
Molar ratio =1:1
Molar mass of PbS =239.3 g/mol
Mass of PbS = 1000 g x = 1154.9 g = 1.1549 Kg
Thus, mass of PBs is = 1.1549 Kg
(b) PbCO3 (cerussite)
Pb2+ + CO32- ------->PbCO3
Molar ratio =1:1
Molar mass of PbCO3 =267.21 g/mol
Mass...
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Chapter 6, Problem 70P is Solved
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