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Question:

Conjugate base for Bronsted acids H2O and HF are:

H3OandF−, respectively

H3O+andF−, respectively

H3O+andH2F+,respectively

OH−andF−, respectively

Solution:

Correct option is A. OH−andF−, respectively
A conjugate base is formed after releasing H+ ions so, for given acids H2O and HF conjugate base would be
H2O→OH−⏟Conjugate base+H+
HF→F−⏟Conjugate base+H+
Option - A