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| What is a Base? |
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| A base is a compound, which on dissolving in water yields hydroxyl ions (OH-) as the only negative ions. The characteristic property of a base is due to the presence of these negative hydroxyl ions. A base may be an oxide or a hydroxide of a metal. If a base is soluble in water, it dissociates to form a metal ion and the only negative hydroxyl ion. |
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| Substances that combine with acids to form salt and water only are also called bases. It may be noted that ammonium hydroxide is also a base. In water, it dissociates to form ammonium ion and a hydroxyl ion. |
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Study of Acids Bases and Salts
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