Answer :

Name of salt is magnesium chloride [MgCl2]


Magnesium hydroxide is a strong base [Mg(OH)2] and hydrochloric acid [HCl] is a strong acid. When a base and an acid react, they mutually nullify their properties and gives rise to the formation of salt and water. Such reactions are called neutralisation reactions. Thus magnesium hydroxide and hydrochloric acid will react to give salt and water and name of this salt is magnesium chloride.


Mg(OH)2 + 2HCl MgCl2 + H2O


The reaction between magnesium hydroxide and hydrochloric acid is a neutralisation reaction in which acid and base react to give salt and water. Thus one mole of magnesium hydroxide reacts with two moles of hydrochloric acid to give magnesium chloride (salt) and water.


Sulphuric acid [H2SO4] is used for preparing magnesium sulphate.


The chemical formula for magnesium sulphate is [MgSO4]. From its formula, we can conclude that for its preparation we require a base that can provide us with the magnesium ion and an acid which can give us sulphate ion. In the given problem, we are using magnesium hydroxide as a base which will give us magnesium ion. Now the acid which can give us sulphate ion is sulphuric acid. The preparation of [MgSO4] can be represented as follows:


Mg(OH)2 + H2SO4 MgSO4 + H2O


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