Raoult's law for ideal solution states vapor pressure of solvent:
AP_A = P°_A × x_A (mole fraction in solution)
BP_A = x_B × P°_A
CP_A = K_H × x_A
DP_A = P°_A always
Answer & Solution
Correct answer: A. P_A = P°_A × x_A (mole fraction in solution)
Raoult's law: vapor pressure of each component in ideal solution = its pure-state vapor pressure × mole fraction. P_total = P°_A x_A + P°_B x_B. Foundation of distillation.
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