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| 1. |
Which oxide is more basic, MgO or BaO? Why? |
| Answer» Solution :BaO, because basic CHARACTER of oxides increases down the group. On going down the group, the size of the cation increases and hence its acidic nature becomes less. As a result those with smaller sizes generally become amphoteric or more acidic. MgO is a basic oxide too but BaO with a larger sized `BA^(+2)` ION has greater basic nature. This can also be proven by looking at the strength of the HYDROXIDE bases. Where `Ba(OH)_2` is a strong base, `Mg(OH)_2` is a weak base and poorly SOLUBLE in water also. | |