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Solutions & Colligative Properties formula sheet

Every formula in the Solutions & Colligative Properties chapter for JEE Main, with one line on when it applies. Topic 1 is open to everyone; sign in free to read all 21 and download the PDF.

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How we count: 7× asked means 7 past JEE Main questions in the PrepWiser bank needed that formula, and "last" is the latest year one appeared. ★ marks formulas asked 8 or more times.

Concentration and Henry's law

Concentration terms
12× asked, last 2026
m=nBWA (kg),M=nBV (L)m=1000 M1000 d−M MB\begin{aligned}&m=\frac{n_B}{W_A\,(\text{kg})},\qquad M=\frac{n_B}{V\,(\text{L})}\\&m=\frac{1000\,M}{1000\,d-M\,M_B}\end{aligned}
dd in g mL−1^{-1}. Mass %, ppm, xx, mm do not change with TT; MM and % w/v fall on heating.
Henry's law
9× asked, last 2026
pgas=KH xgas,ngas≈pgasKH nsolventp_{\text{gas}}=K_H\,x_{\text{gas}},\qquad n_{\text{gas}}\approx\frac{p_{\text{gas}}}{K_H}\,n_{\text{solvent}}
Partial pressure, dilute, fixed TT. Larger KHK_H: less soluble; KHK_H rises with TT. 1 L water ≈ 55.5 mol.

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19 more formulas in 5 topics

Vapour pressure and Raoult's law, Non-ideal solutions and azeotropes, Colligative properties, Osmosis and osmotic pressure and van 't Hoff factor. Read the first part free. Sign in free with Google to read the rest and download the PDF.

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Vapour pressure and Raoult's law

  • Raoult's law6×
  • Composition of the vapour8×
  • Ideal solution1×

Non-ideal solutions and azeotropes

  • Positive deviation4×
  • Negative deviation4×
  • Azeotropes5×

Colligative properties

  • Relative lowering of vapour pressure14×
  • Elevation of boiling point19×
  • Depression of freezing point22×
  • Molar mass from ΔT10×

Osmosis and osmotic pressure

  • Osmotic pressure11×
  • Molar mass of macromolecules8×
  • Isotonic solutions12×
  • Reverse osmosis2×

van 't Hoff factor

  • van 't Hoff factor7×
  • Dissociation14×
  • Weak electrolyte9×
  • Association8×
  • Comparing colligative properties14×

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About 150 past JEE Main questions from this chapter, with instant answer checking and step-by-step solutions where available. Free, and you can start without signing up.

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Version 1, October 2026. Free to share for study, as it is. Please don't sell it or remove the PrepWiser name.

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