Ka for acetylsalicylic acid (aspirin), hc9h7o4, is 3.00*10-4. ka for hydrocyanic acid, hcn, is 4.00*10-10. ka for benzoic acid, c6h5cooh, is 6.30*10-5. what is the formula for the strongest acid?

Ka is the acid-dissociation constant of each of these acids. It represents the proportion of a given amount of the acid that dissociates from the acid into H + and it’s conjugate base when dissolved into solution.

The concentration of H + determines the strength of the acids, so those acids with the biggest Ka values are the strongest acids.

Your order would be:

Aspirin (strongest)

Benzoic

Hydrocyanic (weakest)