Question

the ph value when acid reacts with base

Answer 1

It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic).

Any pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid. 0 is the strongest acid and 14 is the strongest base.

hope you got it

Answer 2

Mixing an acid with the same amount of base gives a neutralization reaction.
example:HCl+NaOH=NaCl+H2O+Heat