Boiling Point Calculator

Calculate boiling point elevation using colligative properties. Determine how adding a solute affects the boiling point of a solvent.

Boiling Point Calculator

About Boiling Point Elevation

Formula

ΔTb = i × Kb × m

Where ΔTb = boiling point elevation, i = van't Hoff factor, Kb = ebullioscopic constant, m = molality

Selected Solvent

Water (H₂O)
Kb = 0.512 °C/m
Normal BP = 100°C

How to Use

  1. Select the solvent from the dropdown
  2. Choose the solute type (electrolyte vs non-electrolyte)
  3. Enter the molality of the solution
  4. For custom solutes, enter the van't Hoff factor
  5. Click Calculate to get the boiling point elevation

Van't Hoff Factor (i)

  • Non-electrolytes: i = 1 (e.g., glucose, sucrose)
  • Strong electrolytes: i = number of ions (e.g., NaCl → i = 2)
  • Weak electrolytes: i = 1-2 (partial dissociation)
  • Custom: Enter specific value for complex solutes

Applications

  • Antifreeze solutions
  • Boiling point determination
  • Colligative property studies
  • Solution concentration analysis
  • Laboratory experiments

Important Notes

  • Molality is independent of temperature
  • Assumes ideal solution behavior
  • Works best for dilute solutions
  • Temperature must be in Celsius
  • Kb values are solvent-specific