Question

A certain weak acid has ka = 1 * 10-4. Calculate the equilibrium constant for its reaction with strong base

Answer 1

Answer:

Explanation:

Solution  

Equilibrium reaction is

HA+BOH⇌BA+H2​O

weak    strong

HA+B++OH−⇌B++A−+H2​O

or HA+OH−⇌A−+H2​O

K=[HA][OH−][A−]​

In the above reaction

Kh​=[A−][HA][OH−]​

so, K=Kh​1​

We know that

Kh​=Ka​Kw​​=1.0×10−410−14​=10−10