ammonium hydroxide: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “ammonium hydroxide” mean?
A chemical compound formed by dissolving ammonia gas in water, resulting in a solution that is a weak base.
Audio
Pronunciation
Definition
Meaning and Definition
A chemical compound formed by dissolving ammonia gas in water, resulting in a solution that is a weak base.
A common laboratory reagent and cleaning agent, often referred to as 'aqueous ammonia' or 'ammonia solution'. It is a colourless liquid with a pungent odour.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Both use the same term. Spelling of related words may differ (e.g., 'colourless' vs. 'colorless').
Connotations
Identical technical connotations.
Frequency
Equally low frequency in general language, but standard in scientific contexts in both regions.
Grammar
How to Use “ammonium hydroxide” in a Sentence
[Substance] is treated with ammonium hydroxide.Ammonium hydroxide is added to [solution/substance].[Precipitate] forms upon addition of ammonium hydroxide.Vocabulary
Collocations
Examples
Examples of “ammonium hydroxide” in a Sentence
verb
British English
- The precipitate was then ammonium hydroxided. (Highly contrived, not standard.)
American English
- The mixture needs to be ammonium hydroxided. (Highly contrived, not standard.)
adverb
British English
- None. It does not function as an adverb.
American English
- None. It does not function as an adverb.
adjective
British English
- The ammonium hydroxide solution was carefully decanted.
- Use ammonium hydroxide reagent for this test.
American English
- The ammonium hydroxide solution was carefully decanted.
- Use ammonium hydroxide reagent for this test.
Usage
Meaning in Context
Business
Rare, except in chemical supply, manufacturing, or cleaning product industries.
Academic
Common in chemistry textbooks, lab manuals, and research papers.
Everyday
Very rare. Might be encountered on cleaning product labels (often just as 'ammonia').
Technical
The primary domain. Used in laboratory procedures, industrial processes, and chemical formulations.
Vocabulary
Synonyms of “ammonium hydroxide”
Strong
Neutral
Weak
Vocabulary
Antonyms of “ammonium hydroxide”
Watch out
Common Mistakes When Using “ammonium hydroxide”
- Confusing 'ammonium hydroxide' (the solution) with 'ammonia' (the gas).
- Pronouncing 'hydroxide' as /ˈhaɪ.drɔks.aɪd/ (incorrect stress). Correct is /haɪˈdrɒk.saɪd/.
- Using it as a countable noun (e.g., 'an ammonium hydroxide'). It is generally uncountable.
FAQ
Frequently Asked Questions
Yes. It is corrosive, has a pungent smell that can irritate the respiratory system, and its fumes are harmful. It requires proper handling with ventilation and protective equipment.
Ammonia (NH₃) is a pungent gas. Ammonium hydroxide is the solution produced when ammonia gas dissolves in water, containing NH₄⁺ and OH⁻ ions.
In everyday language (e.g., 'household ammonia'), yes. In precise scientific or technical writing, 'ammonium hydroxide' or 'aqueous ammonia' is preferred to avoid ambiguity with the gas.
Common uses include as a laboratory reagent (e.g., in qualitative inorganic analysis), a household cleaner (for glass and surfaces), a pH regulator, and in various industrial processes like the production of fertilisers and textiles.
A chemical compound formed by dissolving ammonia gas in water, resulting in a solution that is a weak base.
Ammonium hydroxide is usually technical/scientific in register.
Ammonium hydroxide: in British English it is pronounced /əˌməʊ.ni.əm haɪˈdrɒk.saɪd/, and in American English it is pronounced /əˌmoʊ.ni.əm haɪˈdrɑːk.saɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. It is a technical term.”
Learning
Memory Aids
Mnemonic
Think: 'AMMONia' gas + 'ium' (like a metal ion) + 'HYDRO' (water) + 'OXIDE' (oxygen compound) = the water-based form of ammonia.
Conceptual Metaphor
Often conceptualised as a 'cleaning agent' or a 'chemical tool' for adjusting pH (making things less acidic).
Practice
Quiz
What is ammonium hydroxide commonly known as in non-technical settings?