What is the molarity of na + in a solution of nacl whose salinity is 5.6 if the solution has a density of 1.03 g/ml?

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Chemistry

Brenda Ball

19 November, 09:59

What is the molarity of na + in a solution of nacl whose salinity is 5.6 if the solution has a density of 1.03 g/ml?

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Carlee Kaiser · Answer 1

Salinity has units of grams NaCl or salt per kilogram solution. We can use the density given and the molar mass of the salt to convert from salinity to molarity. We do as follows:

(5.6 g / kg) (1.03 kg / L) (1 mol / 58.44 g) = 0.0987 mol NaCl / L