The reaction sequence given here starts with elemental tin (Sn) and proceeds to form various tin compounds such as tin(II) oxide (SnO), tin(II) hydroxide (Sn(OH)2), tin(II) sulfate (SnSO4), and tin(II) chloride (SnCl2). Each compound is formed through a series of chemical reactions that involve the addition of oxygen, hydroxide ions, sulfuric acid, or hydrochloric acid to tin. The overall transformation of tin through these reactions leads to the formation of different tin compounds with varying oxidation states.