Formality Calculator
Calculate formality (F) of a solution. Formality = formula weights of solute / liters of solution
Formality: F = formula weights / L
Common Compounds:
Formality
1.000000 F
Formula Weights
1.0000
Volume
1.0000 L
Formula:
F = FW / V = (mass / formula weight) / V
What is Formality?
Formality (F) is a concentration unit used primarily for ionic compounds that dissociate in solution. It represents the number of formula weights (or moles of the formula unit as written) dissolved per liter of solution. Unlike molarity, formality does not account for dissociation or association in solution. For example, a 1 F NaCl solution contains 1 formula weight of NaCl per liter, even though it dissociates into Na+ and Cl- ions.