Question

Pick the statements from the list below that are FALSE.

A. KW=[H+][OH-]/[H2O]
B. Ka=Kw/Kb
C. KW=[H+][OH-]
D. Ka=1/Kb

Answer 1

Option A and option D.

Step-by-step explanation:

A. Kw = [H⁺] [OH⁻] / [H₂O] FALSE

This is the expression for the water's equilbirium.

2H₂O ⇄ H₃O⁺ + OH⁻

We can also say: H₂O ⇄ H⁺ + OH⁻

In the expression for K, we do not consider water.

Option C is correct: Kw = [H⁺] [OH⁻]

B. True

Kw = Ka . Kb

So, Ka = Kw / Kb

C. We saw, that is true.

D. Ka is not Kb⁻¹ . FALSE

Ka = Kw / Kb

Ka = 10^⁻(pKa)