gram equivalent: meaning, definition, pronunciation and examples
Low (C2/Highly Technical)Technical/Scientific
Quick answer
What does “gram equivalent” mean?
The mass in grams of a substance that is chemically equivalent to one gram of hydrogen or eight grams of oxygen, determined by the substance's valency and molecular weight.
Audio
Pronunciation
Definition
Meaning and Definition
The mass in grams of a substance that is chemically equivalent to one gram of hydrogen or eight grams of oxygen, determined by the substance's valency and molecular weight.
A unit of amount of substance used in stoichiometric calculations, particularly in older chemistry contexts, representing the equivalent weight expressed in grams.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or conceptual differences. Both varieties use the term identically within scientific discourse.
Connotations
Purely technical, with a slight connotation of being an older or more traditional unit.
Frequency
Equally low and specialised in both varieties. The term 'equivalent weight' is more common than 'gram equivalent'.
Grammar
How to Use “gram equivalent” in a Sentence
The gram equivalent of [SUBSTANCE] is [NUMBER] grams.[NUMBER] gram equivalents of [SUBSTANCE] were used.Vocabulary
Collocations
Examples
Examples of “gram equivalent” in a Sentence
verb
British English
- The procedure requires you to gram-equivalent the sample mass. (Note: This is a non-standard, forced usage; the term is almost exclusively a noun.)
American English
- To standardise the solution, you must calculate its gram equivalent. (Noun usage)
adjective
British English
- The gram-equivalent concept is foundational. (Note: Hyphenated adjectival form is occasionally seen.)
American English
- The gram equivalent mass was recorded. (Noun used attributively)
Usage
Meaning in Context
Business
Not used.
Academic
Used exclusively in chemistry education and historical scientific texts.
Everyday
Not used.
Technical
Used in specific fields of analytical chemistry, electrochemistry (e.g., Faraday's laws), and stoichiometry for solutions (normality).
Vocabulary
Synonyms of “gram equivalent”
Strong
Neutral
Weak
Vocabulary
Antonyms of “gram equivalent”
Watch out
Common Mistakes When Using “gram equivalent”
- Using 'gram equivalent' interchangeably with 'mole' without considering valency.
- Forgetting that the gram equivalent of a substance changes depending on the specific chemical reaction (its role).
- Misspelling as 'gram-equivalent' (hyphen is not standard).
FAQ
Frequently Asked Questions
No. A mole is a fixed number of entities (Avogadro's number). A gram equivalent depends on the substance's valency in a specific reaction. One mole of a substance can contain one, two, or more gram equivalents.
Primarily in historical chemistry texts, some older analytical chemistry protocols, and in the definition of 'normality' (N), which is concentration expressed as gram equivalents per litre.
Divide the molar mass of the compound by the number of equivalents per mole. For an acid, this is often the number of H+ ions it can donate; for a base, the number of OH- ions; for a redox agent, the number of electrons transferred.
It clarifies the historical development of chemical stoichiometry and the concept of 'equivalents', which is crucial for understanding older literature and certain analytical techniques like titration calculations using normality.
The mass in grams of a substance that is chemically equivalent to one gram of hydrogen or eight grams of oxygen, determined by the substance's valency and molecular weight.
Gram equivalent is usually technical/scientific in register.
Gram equivalent: in British English it is pronounced /ˌɡræm ɪˈkwɪvələnt/, and in American English it is pronounced /ˌɡræm əˈkwɪvələnt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think: GRAM EQUIVALENT = the GRAM weight that is EQUIVALENT in chemical 'reaction power' to 1g of hydrogen.
Conceptual Metaphor
A CHEMICAL CURRENCY EXCHANGE RATE: The gram equivalent is like the exchange rate that tells you how many grams of one substance 'trades' for a fixed amount (1g H) in a chemical reaction.
Practice
Quiz
What is the primary reason the term 'gram equivalent' is considered dated?