羧基

suōjī

noun

Meanings

1 carboxyl group

Characters

group (in chemistry)

Examples

HSK 7-9

氨基酸的一端是氨基，另一端是羧基。

Ānjīsuān de yì duān shì ānjī, lìng yì duān shì suōjī.

One end of an amino acid is an amino group, and the other end is a carboxyl group.

HSK 7-9

有机酸之所以呈酸性，是因为羧基能释放氢离子。

Yǒujīsuān zhīsuǒyǐ chéng suānxìng, shì yīnwei suōjī néng shìfàng qīnglízǐ.

Organic acids are acidic because the carboxyl group can release hydrogen ions.

Tips

usage

Written -COOH. It belongs to a family of chemistry characters built on 羊, taken from 氧 'oxygen': 羟 (hydroxyl), 羰 (carbonyl) and 羧 (carboxyl). Acids that carry it are 羧酸, carboxylic acids.

Stroke Order

羧 suō

基 jī