Chemistry

Boiling Point Elevation Calculator

Find how much a solute raises the boiling point.

Calculated Output

Boiling point increase (°C) 1.024

Formula: ΔTb = i · Kb · molality

Step-by-Step Breakdown

1. Values used:

2. Van't Hoff factor (i) = 2

3. Ebullioscopic constant (Kb) = 0.512 °C/m

4. Molality = 1 mol/kg

6. Boiling point increase = Van't Hoff factor (i) x Ebullioscopic constant (Kb) = 2 x 0.512 = 1.024°C

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The math behind it

ΔTb = i × Kb × molality. Water's Kb = 0.512 °C/m; i = number of dissolved particles per formula unit.

NaCl (i=2), 1 m in water → +1.02 °C.

Van't Hoff factor?

1 for non-electrolytes, ~2 for NaCl, ~3 for CaCl₂.