Definition of amphoteric in English:

amphoteric

adjectiveˌamfəˈtɛrɪkˌamfəˈterik

Chemistry

(of a compound, especially a metal oxide or hydroxide) able to react both as a base and as an acid.
〔化〕（化合物，尤指金属氧化物或氢氧化物）两性的
Example sentencesExamples
- Proteins can also be amphoteric compounds - a compound that can take on a negative or positive charge depending on the surrounding conditions.
- Finally, amphoteric detergents have either a positively or negatively charged ion, depending on the pH of the system they are incorporated into.
- Amino acids are amphoteric organic acids that are able to biochemically react with both acids or bases.
- The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine.
- The presence of both of these ions makes water an amphoteric substance.

Origin

Mid 19th century: from Greek amphoteros, comparative of amphō 'both', + -ic.

Definition of amphoteric in US English:

amphoteric

adjectiveˌamfəˈterik

Chemistry

(of a compound, especially a metal oxide or hydroxide) able to react both as a base and as an acid.
〔化〕（化合物，尤指金属氧化物或氢氧化物）两性的
Example sentencesExamples
- The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine.
- The presence of both of these ions makes water an amphoteric substance.
- Finally, amphoteric detergents have either a positively or negatively charged ion, depending on the pH of the system they are incorporated into.
- Amino acids are amphoteric organic acids that are able to biochemically react with both acids or bases.
- Proteins can also be amphoteric compounds - a compound that can take on a negative or positive charge depending on the surrounding conditions.

Origin

Mid 19th century: from Greek amphoteros, comparative of amphō ‘both’, + -ic.

词汇	amphoteric
释义	Definition of amphoteric in English: amphoteric adjectiveˌamfəˈtɛrɪkˌamfəˈterik Chemistry (of a compound, especially a metal oxide or hydroxide) able to react both as a base and as an acid. 〔化〕（化合物，尤指金属氧化物或氢氧化物）两性的 Example sentencesExamples Proteins can also be amphoteric compounds - a compound that can take on a negative or positive charge depending on the surrounding conditions. Finally, amphoteric detergents have either a positively or negatively charged ion, depending on the pH of the system they are incorporated into. Amino acids are amphoteric organic acids that are able to biochemically react with both acids or bases. The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine. The presence of both of these ions makes water an amphoteric substance. Origin Mid 19th century: from Greek amphoteros, comparative of amphō 'both', + -ic. Definition of amphoteric in US English: amphoteric adjectiveˌamfəˈterik Chemistry (of a compound, especially a metal oxide or hydroxide) able to react both as a base and as an acid. 〔化〕（化合物，尤指金属氧化物或氢氧化物）两性的 Example sentencesExamples The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine. The presence of both of these ions makes water an amphoteric substance. Finally, amphoteric detergents have either a positively or negatively charged ion, depending on the pH of the system they are incorporated into. Amino acids are amphoteric organic acids that are able to biochemically react with both acids or bases. Proteins can also be amphoteric compounds - a compound that can take on a negative or positive charge depending on the surrounding conditions. Origin Mid 19th century: from Greek amphoteros, comparative of amphō ‘both’, + -ic.
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