ead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 %Pb by mass. How much of the water (in mL) contains 150 mg of Pb? (Assume a density of 1.0)

Question

Chemistry

Lilia Phelps

15 February, 07:01

ead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 %Pb by mass. How much of the water (in mL) contains 150 mg of Pb? (Assume a density of 1.0)

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Answers (1)

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Jennifer Cooke · Answer 1

1.3 * 10⁴ mL

Explanation:

A Pb-contaminated water sample contains 0.0012 %Pb by mass, that is, there are 0.0012 g of Pb in 100 g of solution. The mass of the sample that contains 150 mg (0.150 g) of Pb is:

0.150 g Pb * (100 g sample/0.0012 g Pb) = 1.25 * 10⁴ g sample

The density of the sample is 1.0 g/mL. The volume of the sample is:

1.25 * 10⁴ g * (1 mL/1.0 g) = 1.3 * 10⁴ mL