Acid : A species (molecule or ion) that can lose a proton (H+) is called an acid.
Conjugate base : A conjugate base is simply an acid that has given up a proton(H+).
1. [tex]HF(acid) \rightarrow F^{-}(conjuagte base)[/tex]
HF is an acid which will lose its proton(H+) and form its conjugate base [tex]F^{-}[/tex]
2. [tex]HNO_{3}(acid) \rightarrow NO_{3}^{-}(conjuagte base)[/tex]
[tex]HNO_{3}[/tex] is an acid which will lose its proton(H+) and form its conjugate base[tex] NO_{3}^{-}[/tex]
3.[tex]CH_{3}CH_{2}CH_{2}OH \rightarrow CH_{3}CH_{2}CH_{2}O^{-}(conjuagte base)[/tex]
[tex]CH_{3}CH_{2}CH_{2}OH[/tex] will lose its proton(H+) and form its conjugate base [tex]CH_{3}CH_{2}CH_{2}O^{-}[/tex]
Note : An acid when loses its proton(H+) form the conjugate base.