The value for a base is at 298 K

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

The

K_b

value for a base is

5.0 \times 10^{-2} \text{ mol dm}^{-3}

at 298 K. What is the

K_a

value for its conjugate acid at this temperature? (1)

5.0 \times 10^{-2}

(2)

2.0 \times 10^{-6}

(3)

2.0 \times 10^{-12}

(4)

2.0 \times 10^{-13}