=KClO is known as potassium hypochlorite whereas HOCl is Hypochlorous acid.
HOCl is weak acid and its conjugate base ClO- is strong.
from the above equation, salt is a strong one that dissociates 1:1 that way potassium hypochlorite concentration = hypochlorite ion concentration
[ClO-] = 0.375
According to Henderson Hasselbalch equation, for which buffer solution contains weak acid and its conjugate base is
Ka = acid dissociation constant Pka = -log[Ka] which is for hypochlorous acid is 7.46 standard value
PH = 7.46 + log (0.375/0.435)
= 7.46 + log (0.862)
= 7.46+ log (8.62x10-1)
=7.46 +log(8.62) + log (10-1)
7.46+ 0.935-1
PH= 7.395
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