The general reaction between a metal oxide and an acid can be written as:


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  1.  Metal oxide + acid  salt + water

    • Metal oxides are basic in nature.
    • When an acid reacts with a metal oxide they both neutralize each other.
    • The new compounds formed are salt and water.

    Acid + Metal Oxide ⇨ Salt + Water

    • Example: Calcium is metal and calcium oxide is a metallic oxide which is basic in nature.
    • When an acid (hydrochloric acid) reacts with calcium oxide, neutralization reaction takes place and calcium chloride along with water is formed.

    2HCl + CaO ⇨ CaCl2 + H2O

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