The safe drinking water act (sdwa) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/l. water suppliers must periodically test their water to ensure that mercury levels do not exceed 0.002 mg/l. suppose water becomes contaminated with mercury at twice the legal limit (0.004 mg/l). part a how much of this water would have to be consumed to ingest 0.100 g of mercury?

The volume of mercury-contaminated water that has to be consumed to ingest 0.100 g mercury is 2.50 × 10⁴ l

Explanation:

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First, let´s convert 0.100 g to mg:

0.100 g · (1000 mg/1 g) = 100 mg

The contaminated water has 0.004 mg per liter, then, we have to find the volume of water that contains 100 mg of mercury:

100 mg · (1 l / 0.004 mg) = 2.50 × 10⁴ l

Then, the volume of mercury-contaminated water ( at a concentration of 0.004 mg/l) that has to be consumed to ingest 0.100 g mercury is 2.50 × 10⁴ l

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