) PABA refers to para-aminobenzoic acid which is used in some sunscreen formulations. If a 0.055 M solution of PABA has a pH of 2.96, determine the Ka of PABA. What kind of problem do you think thisis

of PABA is 0.000022

Explanation:

  cM              0             0

So dissociation constant will be:

Give c= 0.055 M and = ?

Putting in the values we get:

Thus of PABA is 0.000022

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