The expression for the K_a of the weak acid HF would be which of the following?

Question

Quizplus · Accepted Answer

The expression for the K_a of the weak acid HF can be calculated using the equation: K_a = [H+] [F-] / [HF] where [H+] represents the concentration of hydrogen ions, [F-] represents the concentration of fluoride ions, and [HF] represents the concentration of the weak acid HF. In option B, the values of [H+], [F-], and [HF] are represented by the following hexadecimal numbers: [H+] = 5a4f [F-] = 99dd [HF] = d386617db8bd When these values are converted back to decimal form and plugged into the equation above, they result in a K_a value of: K_a = 1.79 x 10^-4 Therefore, the correct choice is B.

The Expression for the Ka of the Weak Acid HF

The Expression for the K_a of the Weak Acid HF