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If you are given a 7 mOsM solution of sodium chloride what is the percent solution?

If you are given a 7 mOsM solution of sodium chloride what is the percent solution?

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Answer #1

7mOsM means 3.5 M as osmolarity is equal to the multiplication of dissociation factor to the molarity.

Percent by mass = mass of NaCl / total mass of solution × 100%

Volume of solution is assumed to be 1 litre.

Mass of nacl = no of moles × molar mass = 3.5 × 58.44 = 205 gms.

Mass of the solution = density × volume.

Density of solution / water is 1.2 gm/ml

= 1.2 × 1000 = 1200 gms.

Percent concentration = mass of NaCl / mass of solution ×100

= 205/1200 ×100% = 17.08%

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