Question

For a weak base of concentration \(C\) and degree of dissociation \(\alpha\), what is the correct relation between \(K_b\) and \(C\)?

• A. \(K_b = C\alpha\)
• B. \(K_b = C\alpha^2\)
• C. \(K_b = \dfrac{\alpha}{C}\)
• D. \(K_b = \dfrac{C}{\alpha^2}\)

Hint:

Recall the exact Ostwald dilution-law form $K_b=C\alpha^2/(1-\alpha)$. Use the fact that the degree of dissociation of a weak base is very small.

Answer 1

The Correct Option is B