The acid dissociation constant, Ka, of acetic acid is 1.8 x 10-5. What is the pKa of this acid?

Answer 1

Hey Itzel,

pK_a is when you take the -log₁₀ of your K_a. Therefore, taking the -log₁₀(1.8*10-5), we get a value of approximately 4.74 for our pK_a for acetic acid.

Hope this helps!