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Reactivity

Comparing metals with reactivity

TermDefinition
Reactive strong drive to become a compound
Potassium with water very violent with cold water, catches fire, produces: hydrogen and potassium hydroxide
Sodium with water violent with cold water, produces: hydrogen and sodium hydroxide
Calcium with water less violent with cold water, produces: hydrogen and calcium hydroxide
Magnesium with water very slow reaction with cold water, vigorous with steam, produces hydrogen and magnesium oxide
Zinc with water quite slow with steam, produces: hydrogen and zinc oxide
Iron with water slow with steam, produces: hydrogen and iron oxide (rust)
Copper/Silver/Gold with water no reaction
Magnesium with HCl vigorous, produces: hydrogen and solution of magnesium chloride
Zinc with HCl quite slow, produces: hydrogen and zinc chloride
Iron with HCl slow, produces: hydrogen and iron (ii) chloride
Lead with HCl slow, only if concentrated, produces: hydrogen and lead (ii) chloride
Copper/Silver/Gold with HCl no reaction even if conc.
Hydrogen displacement Hydrogen is displaced by a more reactive metal
Competing to be the compound in solution A metal will always displace a less reactive metal from solutions of its compounds
Competing for oxygen When a metal is heated with the oxide of a less reactive metal, it acts as a reducing agent. It is always exothermic –gives out heat
Oxidation gain of oxygen, loss of electrons, loss of hydrogen
Reduction loss of oxygen, gain of hydrogen/electrons
Created by: azra3.142