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Describe the methods of preparation of acids and bases with the help of examples. |
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Answer» Solution :Methods of preparation of acids and bases Acids From non-METALS: Non-metallic elements on heating with oxygen give corresponding oxides. Some oxides on dissolution in water give the corresponding acids and hence such non-metallic oxides are called acidic oxides. Eamples: `C + O_(2) RARR CO_(2)` `""CO_(2) + H_(2)O rarr H_(2)CO_(3)` `""S + O_(2) rarr SO_(2)` `""SO_(2) + H_(2)O rarr H_(2)SO_(3)` `""2SO_(2) + O_(2) rarr 2SO_(3)` `""SO_(3) + H_(2)O rarr H_(2)SO_(4)` The oxides which are insoluble in water are called neutral oxides. Examples: NO, CO Bases From metals: Metals on heation with oxygen give metal oxides which are basic in nature. These metal oxides on dissolution in water give corresponding alkalies (water soluble BASE). Examples: `4Na + O_(2) rarr 2Na_(2)O` `""Na_(2)O + H_(2)O rarr 2NaOH` `""2Mg + O_(2) rarr 2MgO`, `""MgO + H_(2)O rarr Mg(OH)_(2)` |
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