Question

what is acid ?
what is base ?​

Answer 1

Answer:

An acid is a molecule or ion capable of either donating a proton, known as a Brønsted–Lowry acid, or, capable of forming a covalent bond with an electron pair, known as a Lewis acid. The first category of acids are the proton donors, or Brønsted–Lowry acids

In chemistry, there are three definitions in common use of the word base, known as Arrhenius bases, Brønsted bases and Lewis bases. All definitions agree that bases are substances which react with acids as originally proposed by G.-F. Rouelle in the mid-18th century.

Answer 2

Acid= any substance which when dissolved into the water produces hydrogen icons (H+)

Base= any substance which when dissolved into the water produces hydrogen icons (OH-)