In a binary solution containing solvent and solute , let and denote their respective mole fractions, — Solutions and Colligative Properties Chemistry Question
Question
In a binary solution containing solvent $A$ and solute $B$, let $\chi_A$ and $\chi_B$ denote their respective mole fractions, and $n_A$ and $n_B$ denote their moles. Which of the following statements are mathematically true?
Answer: A,B,D
💡 Solution & Explanation
The sum of all mole fractions in a mixture equals 1 (A). The ratio $\chi_A/\chi_B = (n_A/n_{total}) / (n_B/n_{total}) = n_A/n_B$ (B). Mole percent is precisely the mole fraction scaled by 100 (D). Mole fraction is based purely on counting moles and is completely independent of volume/temperature (C is false).
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