Raoult's laws

Raoult's first law

$\Delta p=p_{0}\cdot {\frac {n_{2}}{n_{1}}}$

Δp = pressure difference, p₀ = original pressure, n₂ = number of solute particles, n₁ = number of solvent particles.

Raoult's second law

Dissolving a substance in a solvent increases its boiling point.

$\Delta T_{v}=K_{e}\cdot c_{m}$

K_e = solvent ebullioscopic constant, c_m = solute concentration.

Raoult's third law

Dissolving a substance in a solvent lowers its freezing point.

$\Delta T_{v}=-K_{r}\cdot c_{m}$

K_r is the cryoscopic constant of the solvent.

Links

Source

• KUBATOVA, Senta. Biofot [online]. [cit. 2011-01-31]. <https://uloz.to/!CM6zAi6z/biofot-doc>.