Chemistry Practice Problems ppm Practice Problems Solution: The maximum allowable concentration of lead in dri...

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Solution: The maximum allowable concentration of lead in drinking water is 9.0  ppb.Calculate the molarity of lead in a 9.0- ppb solution.

Problem

The maximum allowable concentration of lead in drinking water is 9.0  ppb.

Calculate the molarity of lead in a 9.0- ppb solution.

Solution

We’re being asked to determine the molarity of lead (Pb) in a 9.0-ppb solution. Let’s first define ppm and ppb.


1 ppm means 1 part of solute for every 106 parts of the solution

in terms of solutions:

ppm=μg solutemL solution


1 ppb means 1 part of solute for every 109 parts of the solution

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