Equivalent Weight
| Formula / Notation | Eq. wt = M/n (g/equiv) |
|---|---|
| Also Known As | Gram equivalent weight; equivalent mass; Eq. wt; n-factor weight; normality basis |
What is Equivalent Weight?
Equivalent weight is the mass of a substance (in grams) that reacts with or is equivalent to one mole of hydrogen ions (for acids/bases) or one mole of electrons (for redox reactions). It equals the molar mass divided by the number of reactive units (n): Eq. wt = M/n. Equivalents and normality (equivalents/litre) are based on this concept.
Formula & Notation
Other Names / Synonyms: Gram equivalent weight; equivalent mass; Eq. wt; n-factor weight; normality basis
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Equivalent weight is the mass of a substance (in grams) that reacts with or is equivalent to one mole of hydrogen ions (for acids/bases) or one mole of electrons (for redox reactions). It equals the molar mass divided by the number of reactive units (n): Eq. wt = M/n. Equivalents and normality (equivalents/litre) are based on this concept.
Older analytical chemistry and titration calculations; normality-based calculations; standardisation of acid/base solutions; redox titrations; pharmaceutical dosing calculations (historical); still used in some water chemistry and clinical applications
No hazard — a calculation concept. The chemicals whose equivalent weights are calculated may be hazardous.
The formula or notation for Equivalent Weight is: Eq. wt = M/n (g/equiv)