Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 % Pb by mass. What volume of t

Question

Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 % Pb by mass. What volume of the water in milliliters contains 100 mg of Pb

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Doris 5 years 2021-07-13T02:44:22+00:00 1 Answers 20 views 0

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  1. kimchi2
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    2021-07-13T02:46:09+00:00
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    Answer:

    8.3 × 10³ mL

    Explanation:

    Step 1: Calculate the mass of water that contains 100 mg of Pb

    The concentration of Pb in the sample is 0.0012% by mass, that is, there are 0.0012 g of Pb every 100 g of water. The mass of water that contains 100 mg (0.100 g) of Pb is:

    0.100 g Pb × 100 g Water/0.0012 g Pb = 8.3 × 10³ g Water

    Step 2: Calculate the volume corresponding to 8.3 × 10³ g of water

    Since the solution is diluted, we will assume the density of the sample is equal than the density of water (1 g/mL).

    8.3 × 10³ g × 1 mL/1 g = 8.3 × 10³ mL

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