# How do you find KA and KB values?

Category:
science
chemistry

General base dissociation in water is represented by the equation B + H2O --> BH+ + OH-.

**Ka and Kb values**measure how well an acid or base dissociates. Higher**values**of**Ka**or**Kb**mean higher strength. General**Ka**expressions take the form**Ka**= [H3O+][A-] / [HA].

Furthermore, how do you find KB from Ka?

Solve the equation for **Kb** by dividing the Kw by the **Ka**. You then obtain the equation **Kb** = Kw / **Ka**. Put the values from the problem into the equation. For example, for the chloride ion, **Kb** = 1.0 x 10^-14 / 1.0 x 10^6.

**Kb value**refers to a standardized ASTM test that measures the relative strength of a non-aqueous cleaning fluid. Mild solvents with lower

**Kb values**will may not be strong enough to dissolve ionics and fluxes.

Simply so, how do you find the Ka value?

Note that x is Related to pH and Calculate **Ka** As noted above, [H3O+] = 10^{-}^{pH}. Since x = [H3O^{+}] and you know the pH of the solution, you can write x = 10^{-}^{2.4}. It is now possible to **find** a numerical **value** for **Ka**. **Ka** = (10^{-}^{2.4})^{2} /(0.9 - 10^{-}^{2.4}) = 1.8 x 10^{-}^{5}.

**Ka** is the "acid dissociation constant." It deals with the concentration of H ^{+} ions. **Kb** is the "base dissociation constant." It deals with the concentration of OH ^{-} ions.