The EPA Has Determined That the Maximum Safe Level of Lead

question 118

Multiple Choice

The EPA has determined that the maximum safe level of lead ion in drinking water is 15 ppb. If a sample of tap water has a lead ion concentration of 0.016 ppm, what is the concentration of the lead ion in ppb, and is the water safe to drink? Assume the density of the solution is 1.00 g/mL.

• A)160 ppb, not safe
• B)16 ppb, not safe
• C)1600 ppb, not safe
• D)0.16 ppb, safe
• E)1.6 × 10^-6 ppm, safe

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