Question

Calculate Kb for a 0.1 M solution of acetate ion, given that Ka for acetic acid is 1.8 x 10−5. Group of answer choices 8.4 x 10−9 7.4 x 10−8 5.56 x 10−10 4.24 x 10−3 6.4 x 10−6 1.8 x 105 1.34 x 10−3

Answer 1

5.56 x 10^-10

Step-by-step explanation:

The ion product of water, Kw, is given by the equation Kw = Ka * Kb. At 25°C, the value of Kw is 1.0 x 10^-14.

Given that the Ka for acetic acid is 1.8 x 10^-5, we can rearrange the equation to solve for Kb:

Kb = Kw / Ka

Substituting the given values:

Kb = (1.0 x 10^-14) / (1.8 x 10^-5)

This gives us a Kb value of approximately 5.56 x 10^-10.