Stranitsa 81 Zadanie — Reshebnik Po Khimii 9 Klass Novoshinskii 7-e Izdanie
The 9th-grade Chemistry textbook by I.I. Novoshinsky and N.S. Novoshinskaya (7th edition, page 81) generally covers the chemical properties of halogens, particularly chlorine, and exercises related to electrolytic dissociation and hydrochloric acid. The tasks typically involve writing chemical equations for reactions with substances like phosphorus and water, along with creating ionic equations and identifying chloride ions with silver nitrate, focusing on redox properties and precipitation.