Question
Download Solution PDFThe mole fraction of NaCl in a solution containing 1 mole of NaCl in 1000 g of water is -
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:-
- Mole fraction is defined as the major concentration of a solute and solvent in terms of the number of moles.
- Mole fraction of a solute(XA) = n A /n A + n B
- Mole fraction of a solute(XB) = n B /n A + n B
Calculation:-
⇒ No. of moles = Given mass / Molar mass
⇒ Mole fraction of NaCl = No. of moles in NaCl / Total no. of moles in the solution
⇒ No. of moles of NaCl = 1
⇒ No. of moles of H2O = Given the mass of H2O / Molar mass of H2O
⇒ No. of moles of H2O = 1000 / 18 = 55.55
Mole fraction of NaCl = No. of moles in NaCl / No. of moles in NaCl + No. of moles of H2O
⇒ Mole fraction of NaCl = 1 / 1 + 55.5
⇒ Mole fraction of NaCl = 0.0177
Last updated on May 5, 2025
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