Chlorine shows oxidation states ranging from −1 to +7 in its compounds. What are the reagent(s) and conditions necessary for the oxidation of elemental chlorine into a compound containing chlorine in the +5 oxidation state?

Many modern cars are fitted with halogen lamps. When such lamps are first switched on, a distinct purple colour can b…

What happens when bromine solution is added to a solution of sodium iodide?

The halogens exist as diatomic molecules, X₂. The boiling points of the Group VII elements increase as the group is d…

Ammonium sulfate, (NH₄)₂SO₄, and ammonium nitrate, NH₄NO₃, are used as fertilisers. These salts have different percen…

River water in a chalky agricultural area contains Ca²⁺, Mg²⁺, CO₃²⁻, HCO₃⁻, Cl⁻ and NO₃⁻ ions. In a water treatment …

After black and white photographic film has been developed, unreacted silver bromide is removed by reaction with sodi…