Question

what do you mean by acid?​

Answer 1

An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. Most acids contain a hydrogen atom bonded that can release (dissociate) to yield a cation and anion in water. The higher the concentration of hydrogen ions produced by an acid, the higher its acidity and the lower the pH of the solution.

The word acid comes from the Latin words acidus or acere, which mean "sour," since one of the characteristics of acids in water is a sour taste (e.g., vinegar or lemon juice).

Answer 2

acid is a substance which has these following properties

• sour to taste
• turns blue litmus paper to red
• contains
• ${h}^{ + } ions$
• produces h+ ions in an aqueous solution