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Sodium fluoride has a solubility of 3.84 g in 100.0 g of water at 18°C. Express...

Sodium fluoride has a solubility of 3.84 g in 100.0 g of water at 18°C. Express this solute concentration in the following terms:

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Answer #1

mass of solute = 3.84 g

moles of solute = 3.84 / 58.5

                          = 0.0656

mass of solvent = 100 g = 0.1 kg

molality = moles of solute / mass of solvent

                = 0.0656 / 0.1

              = 0.656 m

molality = 0.656 m

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