Solutions — Formula Sheet
Punjab Board · Class 12 · Chemistry
5 formulas from Solutions (Punjab Board Class 12 Chemistry) on one page, grouped by topic. Includes Total pressure by Dalton's law.
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Formulas and Key Relations
Vapour Pressure of Liquid Solutions and Raoult's Law
p1 = p°1 × x1 and p2 = p°2 × x2.
Total pressure by Dalton's law
p_total = p1 + p2 = p°1×x1 + p°2×x2.
Key relations
Henry's law states that the partial pressure of a gas above a solution is directly proportional to its mole fraction in the solution: p = KH × x.
Raoult's law states that the partial vapour pressure of each volatile component is directly proportional to its mole fraction: p₁ = p₁⁰ × x₁.
Ideal solutions obey Raoult's law completely and have ΔmixH = 0 and ΔmixV = 0.
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