Problem: Assuming that seawater is a 3.50 mass % aqueous solution of  NaCl, what is the molality of seawater?

FREE Expert Solution

(1): Calculate the mass of the solute (NaCl).

Assuming we have 100 g of solution

mass NaCl = 3.5 g


(2): MM of NaCl is 58.44 g/mol

mass NaCl=3.5 g NaCl×1 mol NaCl58.44 g NaCl

moles NaCl = 0.0599 mol

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Problem Details

Assuming that seawater is a 3.50 mass % aqueous solution of  NaCl, what is the molality of seawater?

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