Alkali metal oxides give strong base when dissolved in water. Alkali metal oxides are soluble in water. Most of the metal oxides are insoluble in water. That is why, aqueous solution of metal oxides turns red litmus blue. Oxides of some metals show dual behaviour, i.e. It is important to remember that oxides of alkali metals are soluble in water. These metals do not react with dilute acids.īeing basic in nature, the solution of metal oxides is alkaline. Following equation shows this reaction.Ĭopper, gold and silver are known as noble metals. When zinc reacts with dilute sulphuric acid, then zinc sulphate and hydrogen gas are formed. Following equation shows this reaction.ĢAl + 6HCl ⇨ 2AlCl 3 + 3H 2 Reaction of Zinc with dilute Acid When aluminium reacts with dilute hydrochloric acid, then aluminium chloride and hydrogen gas are formed. Mg + 2HCl ⇨ MgCl 2 + H 2 Reaction of Aluminium with dilute Acid When magnesium reacts with dilute hydrochloric acid, then magnesium chloride and hydrogen gas are formed. When potassium reacts with dilute sulphuric acid, then potassium sulphate and hydrogen gas are formed. Following equations shows this reaction.ĢNa + 2HCl ⇨ 2NaCl + H 2 Reaction of Potassium with dilute Acid When sodium reacts with dilute hydrochloric acid, then sodium chloride is formed and hydrogen gas evolves. acid ⇨ Metal salt + Hydrogen Reaction of Sodium with dilute Acid Following is the general equation for this reaction. When a metal reacts with a diulte acid, salt and hydrogen gas are formed.
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