Question

how do you obtain a base from another base​

Answer 1

Some basic compounds such as oxides of metal when dissolved in water produce strong base. For example:

Na2O + H2O → NaOH

MgO + H2O → Mg(OH)2

Answer 2

The hydroxides of metals are called bases.

There are certain compounds which are not metal hydroxides but consider as bases. Such bases when dissolved in water forms hydroxides (bases).

Ex: NH₃ + H₂O → NH₄OH

In the above example NH₃ (ammonia) is a base which dissolved in water forms base NH₄OH (ammonium hydroxide).

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