reactions between acids and bases

The concept 'acid' / 'sour' we all know from taste of lemons, vinagre or sour apples. It is a gererally known word, used for ages and intruded in chemistry.
But be carefull please. In chemistry only a few acids can or may be tried, tasted in that way. Never taste a chemical substance!!
This can be very dangerous. Such an acid can be poison or so strong that it immediatly reacts with other substances in your mouth, in your stomach. It can burn.

At the other hand, we have as an opposite of acid: the 'base'.
In chemistry acids and bases are each others opposite, but what does that mean in practice? Is there also a kind of base-taste? Do we have daily things that ar basic, where others are acid?

Indeed. Some people know the taste of soap, for example. That's one of the substances with a basic character, just like soda (=sodium carbonate)

The definitions of acid and base are various and are different from the old definitions. The most well known definition is based on the concept of protons (=H+)

No longer we call a base the substance that can provide OH--ions, as we did in the old days. Some study books may still have this old definition.

An affirmation to think about:
"The neutralisation of diluted cloric acid with a solution of sodium hydroxyde can be represented as follows:

H+(aq) + OH-(aq) H2O(l)