In a baranggay where mining a practiced, a certain water well when were most residents fetch water through a chemical analysis found to contain 0.001 gram of mercury in a 500 g sample. Solve for parts per million (ppm) of mercury in the sample. Is the water safe for drinking? (Use Table 1 on page 14 as your reference).
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Answer:
Answer:
\begin{gathered} \frac{0.001}{500} = 2x {10}^{ - 6} \\ \end{gathered}
500
0.001
=2x10
−6
2x {10}^{ - 6} \times 1000000 = 22x10
−6
×1000000=2
²Mercury on the sample is 2 ppm
³2 ppm = 1. 99 mg/L
No, it is not safe for drinking. "The U.S. Environmental Protection Agency (EPA) sets a Maximum Contaminant Level (MCL) for mercury in drinking water of 0.002 mg/L" ¹
¹source: Protect Yourself from Mercury in your Well Water - NC Epidemiology
²sources:
https://socratic.org/chemistry/solutions-and-their-behavior/solving-using-ppm-parts-per-million
³coverter:
https://www.easycalculation.com/unit-conversion/ppm-mgl-conversion.php
Explanation:
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