Chromic acid is a chemical compound containing hexavalent chromium (Cr(VI)).

Ethyl acetate is a chemical compound commonly used in the chemical industry and various applications.

Formic acid is a chemical compound represented by the formula HCOOH, highlighting its chemical composition consisting of hydrogen (H), carbon (C), and oxygen (O). It is an organic acid commonly used in various industrial, agricultural, and pharmaceutical applications due to its acidic properties and reactivity.

Toluene, also known as methylbenzene or phenylmethane, is an aromatic hydrocarbon in the form of a clear liquid.

Acetone, also known as propanone, is a colorless, volatile liquid with the chemical formula CH₃COCH₃. 

Calcium carbonate is composed of carbonate ions and calcium ions. This white substance has a molar mass of 100.1 g/mol. Calcium carbonate is the major compound found in limestones like chalk, but also in marble.

Hydrochloric acid is an aqueous solution of hydrochloric acid (HCl), a colorless to yellowish chemical compound that is highly corrosive and acidic. The concentration of 30/33% indicates the mass concentration of HCl in the solution. It is one of the most commonly used acid solutions in various industrial, chemical, and cleaning applications.