Question

ammonia is a base but does not contain a hydroxyl group why

Answer 1

Ammonia instead of not having hydroxyl group is a base because it forms OH- ions when added to water as it ionises to form ammonium ions and hydroxide ions after forming ammonium hydroxide when mixed in water.

Answer 2

Explanation:

What are the types of bases?

• The base is defined as the compound which forms hydroxyl (OH-) ions on reaction with water and the pH is usually more than 7.
• When reacting to water, strong bases like NaOH and KOH completely dissociate into constituent ions.

  Ex:  NaOH (in the presence of water) → Na+ + OH-

• In the case of weak bases like NH3 (Ammonia) and aluminum hydroxide [Al(OH)3], dissociation to constituent ions does not occur completely.

For ammonia:

• Ammonia is a weak base that doesn't contain a hydroxyl group.

• when ammonia reacts with water, it first forms ammonium hydroxide which on further ionization gives hydroxide ions and ammonium ions.

   NH3 (in presence of ammonia) → NH4OH

On further ionization,

    NH4OH → NH4+ +OH−

• That's why even if ammonia is not containing any hydroxyl group it is base because it liberates the hydroxyl group at the end of the ionization reaction.

That's why from the above discussion it is proved that ammonia is a base even if it doesn't contain a hydroxyl group.

To learn more about the acid and base based on Lewis's concept,

https://brainly.in/question/9769056

To learn more about the acid and base based on Arrhenius's theory,

https://brainly.in/question/1146818

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