For a binary solution of volatile liquids, the total vapour pressure can be written as:
Ap_total = (p₁⁰ + p₂⁰) / 2
Bp_total = p₁⁰ + (p₂⁰ − p₁⁰) × x₂
Cp_total = p₁⁰ × p₂⁰
Dp_total = p₁⁰ + p₂⁰
Answer & Solution
Correct answer: B. p_total = p₁⁰ + (p₂⁰ − p₁⁰) × x₂
p_total = x₁ p₁⁰ + x₂ p₂⁰. Substituting x₁ = (1 − x₂) gives **p_total = p₁⁰ + (p₂⁰ − p₁⁰) x₂** — linear in x₂.
Related questions
The mass of NaOH (M = 40 g/mol) required to prepare 500 mL of a 0.20 M NaOH solution isWhich of these solutions will boil at the highest temperature at 1 atm?The molality of a 1 M aqueous NaCl solution (density = 1.04 g/mL, NaCl M = 58.5 g/mol) is Osmotic pressure π of a dilute solution obeys π = C R T. Here C representsVan't Hoff factor i > 1 for a solute indicatesA negative deviation from Raoult law is expected whenIf a solute dimerises in solution, its observed molar mass compared with the calculated vaWhich of the following is NOT a colligative property?