[Sam1988]

These may seem like strange questions.

1) What is the real definition of neutralisation if these reactions are considered neutralisation reactions ?

A)Sodium hydroxide and hydrochloric acid (salt and water product, pH7)
B) ammonia and hydrochloric acid in solution  ( Salt formed but is a weak acid, no water and pH below 7)
C)  ammonia and hydrogen chloride gas ( solid Salt formed that would be a a weak acid in solution )


2)
a) secondly, are all acid base reactions neutralisation reaction or are neutralisation reactions a subgroup of acid base reactions?

B) Can you consider Na2O + H2O -> 2NaOH a neutralisation reaction because Na2O is the base and Water is the acid?

[billnotgatez]

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http://www.chemicalforums.com/index.php?topic=65859.0

I deleted the duplicate on the other board

[Orcio_87]

1) What is the real definition of neutralisation if these reactions are considered neutralisation reactions ?

A)Sodium hydroxide and hydrochloric acid (salt and water product, pH7)
B) ammonia and hydrochloric acid in solution  ( Salt formed but is a weak acid, no water and pH below 7)
C)  ammonia and hydrogen chloride gas ( solid Salt formed that would be a a weak acid in solution )

A reaction which product gives solution closer to neutral (7 - water) pH than reaction substrats.

2)
a) secondly, are all acid base reactions neutralisation reaction or are neutralisation reactions a subgroup of acid base reactions?

No, because..

Na₂O + H₂O -> 2 NaOH

gives solution far away from neutral.