Write about the preparation of hydrogen by the action of cold water , hot water ,and steam on metals
Answers
Since water acids and alkalis contain hydrogen they from the cheapest raw materials preparation and manufacture of hydrogen.
hydrogen from cold water and metals
Reactive metals like potassium Sodium and Calcium react with cold water forming a corresponding hydroxide and evolving hydrogen the reactions are exothermic
Action of hydrogen with hot water and steam on metals
Only the magnesium reacts with water to form hydrogen and magnesium reacts slowly with boiling water from the base magnesium Hydroxide liberating hydrogen gas magnesium burns in steam with an intense white light liberating hydrogen gas and white Ash that is magnesium oxide magnesium oxide crumbles down due to heating for the exposing magnesium to steam results in the Liberation of hydrogen gas
Action of steam on metals
Aluminium zinc and iron react with water to form hydrogen aluminium reacts with steam to liberate hydrogen where as Jing is less reactive that is it has only when it is heated and steam is passed over red and iron is less reactive than zinc but red hot iron reacts with steam forming triferric tetroxide and hydrogen gas and also the action of steam on non metals carbon reacts with water to form water gas what is gas also contain carbon monoxide and hydrogen where we can say that hydrogen is formed