Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 month ago

13.11 Silver ion has an average concentration of 28 ppb (parts per billion) in U.S. water supplies.?

Silver ion has an average concentration of 28 ppb (parts per billion) in U.S. water supplies.

What is the molality of the silver ion?

Molality = ??? m

 

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  • 1 month ago

    Suppose each "part" in "ppb" is a gram:

    (28 g Ag) / (107.8682 g Ag/mol) = 0.259576 mol Ag

    1 billion g - 28 g = 999999972 g H2O = 10^6 kg H2O

    (0.259576 mol) / (10^6 kg) = 2.59576 × 10^-7 mol/kg = 2.6 × 10^-7 m

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