Carbonate

Ammonium carbonate is the commercial salt, formerly known as sal volatile or salt of hartshorn. Ammonium carbonate is used when crushed as a smelling salt. It can be crushed when needed in order to revive someone who has fainted.

Copper(II) carbonate (often called copper carbonate or cupric carbonate) is a blue-green compound (chemical formula CuCO₃) forming part of the verdigris patina one sees on weathered brass, bronze, and copper.

Lithium carbonate is a chemical compound with the formula Li₂CO₃. This colorless salt is widely used in the processing of metal oxide and has received attention for its use in psychiatry.

Magnesium carbonate, MgCO₃, is a white solid that occurs in nature as a mineral. Several hydrated and basic forms of magnesium carbonate also exist as minerals. In addition, MgCO₃ has a variety of uses.

Potassium carbonate is a white salt, soluble in water (insoluble in alcohol), which forms a strongly alkaline solution. It can be made as the product of potassium hydroxide's absorbent reaction with carbon dioxide.

Sodium carbonate (also known as washing soda, soda crystals or soda ash), Na₂CO₃, is a sodium salt of carbonic acid. It most commonly occurs as a crystalline heptahydrate, which readily effloresces to form a white powder, the monohydrate; and is domestically well known for its everyday use as a water softener.