Question

The acid dissociation constant ka for hcn is approximately 1 × 10−9. what is the value of the pkb?

Answer 1

pKb = 5

Step-by-step explanation:

To find the pKb, you need to (1) calculate the pka (using the pKa equation) and then (2) calculate the pKb (using the relationship between the pKa and pKb).

(Step 1)

pKa = -log (Ka)

pKa = -log (1 x 10⁻⁹)

pKa = 9

(Step 2)

pKa + pKb = 14

9 + pKb = 14

pKb = 5