碳酸盐

• 石(stone; rock)RADICAL
• 炭(charcoal; coal)PHONO-SEMANTIC

Carbon is a solid substance like stone, essentially charcoal.

• 酉(wine vessel; ferment)RADICAL
• 夋(slow manner; leisurely pace)PHONETIC

Fermenting alcohol produces sourness, which is exactly the character for sour.

• 圤(earth; mineral (hint: rock salt))ASSOCIATIVE
• 皿(bowl; container)RADICAL

Salt is a mineral from the earth held in a bowl.