What are conjugate acid and bases?

What are conjugate acid and bases?
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Answer :

When an acid is dissolved in water it will form H3O+ ions and an anion the anion of an acid is called conjugate base and H3O+ is called conjugate acid e.g.
 CH3OOH + H2O H3O+ + CH3COO–
 Acid Base Conjugate acid Conjugate base
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