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5.85 g of Nacl is dissolved …

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5.85 g of Nacl is dissolved in 90 g of water.what is the mole fraction of Nacl?
  • 2 answers

Ankan Rastogi 3 years, 10 months ago

Very nice

Yogita Ingle 3 years, 10 months ago

Moles = Weight / Molar mass

Moles of NaCl = 5.85 g / (58.5 g/mol) = 0.1 mole
Moles of H₂O = 90 g / (18 g/mol) = 5.0 mole

Mole fraction of NaCl = (Moles of NaCl) / (Total number of moles in solution)
= (Moles of NaCl) / (Moles of NaCl + Moles of H₂O)
= 0.1 mole / (0.1 mole + 5.0 mole)
= 0.1 / 5.1
= 1 / 51

Mole fraction of NaCl in solution is 1 / 51

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