PPT Slide
Is this below the federal standards (5 ppb)?
Yes: [Pb2+] = 3(x) = 3(6.2x10-12) = 1.86x10-11M
1.86x10-11 Mole Pb x 1L x 207 g =
L 103 g water mole
= 3.85 x10-12 g Pb/g water
= 3.85x10-3 g Pb/109 g water
= 3.85x10-3 ppb Pb < 5 ppb standards
Ojo I will not
expect you to
know ppb
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