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This is defined by the Brønsted-Lowry theory as a proton acceptor. They react with acids according to the following equation:
|
Acid + base ⇒ salt + water |
Typical bases are metal oxides and metal hydroxide, for example copper(II) oxide and zinc hydroxide:
|
Zn(OH)2(s) + 2HCl(aq) ⇒ ZnCl2(aq) + 2H2O(l) |
If the base is soluble in water it is known as an alkali, for example sodium hydroxide.